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	Punnett square - Wikipedia, the free encyclopedia
		A Punnett square is genetic tool designed by Reginald Punnett that biologists continue to use in order to determine the probability of an offspring expressing a particular genotype.
		In the Punnett square example above, 50 % of the offspring will have a dominant homozygous genotype (RR), and a 50% probability that the genotype will be heterozygous (Rr).
		Using the genotypes of the two rats, a table is made putting one of the rat's genotype on the top row and the other rat's genotype down the left column.
	en.wikipedia.org /wiki/Punnett_square (575 words)

	Reginald Punnett - Wikipedia, the free encyclopedia
		Punnett was also the creator of the Punnett square, a tool in genetics which is still used by biologists today to predict the probability of possible genotypes of offspring.
		Punnett became the first Arthur Balfour Professor of Genetics at Cambridge, when Bateson left Cambridge in 1912 and was elected a Fellow of the Royal Society in the same year.
		Punnett received the society's Darwin Medal in 1922.
	en.wikipedia.org /wiki/Reginald_Punnett (245 words)

	Reginald Punnett: biography and encyclopedia article (Site not responding. Last check: 2007-09-07)
		Tonbridge is a market town in the englandenglish county of kent, with a population of 31,600 in 2001....
		A punnett square is a tool in genetics developed by british geneticsgeneticist reginald punnett, and which biologists still use to predict the probability...
		Punnett became the first Arthur Balfour Professor of Genetics[Follow this hyperlink for a summary of this subject] at Cambridge, EHandler: no quick summary.
	www.absoluteastronomy.com /encyclopedia/r/re/reginald_punnett.htm (811 words)

	[No title]
		Punnett devised the "Punnett Square" to depict the number and variety of genetic combinations, and had a role in shaping the Hardy-Weinberg law.
		Bateson and Punnett published the first account of gene linkage in sweet peas and Punnett developed the "Punnett Square" to depict the number and variety of genetic combinations.
		Punnett was a quiet, tolerant, cultured man who was excellent at all sport involving a small fast ball.
	www.dnaftb.org /dnaftb/concept_5/con5bio.html (740 words)

	Practicing Punnett Squares
		Use a Punnett square to predict the phenotypic and genotypic outcome (offspring) of a cross between a plant heterozygous/hybrid for yellow (Yy) peas and a plant homozygous/purebred for green (yy) peas.
		Use a Punnett square to predict the phenotypic and genotypic outcome (offspring) of a cross between a plant homozygous for round peas (RR) and a plant homozygous for wrinkled peas (rr).
		Use a Punnett square to predict the phenotypic and genotypic outcome (offspring) of a cross between two plants heterozygous for round peas.
	www.usoe.k12.ut.us /curr/science/sciber00/7th/genetics/sciber/punnett1.htm (351 words)

	Bio 105/6 Study Guide #3 (Site not responding. Last check: 2007-09-07)
		Use a Punnett square to show how a 3:1 ratio of dominant:recessive phenotypes is obtained when crossing two individuals heterozygous for a single trait (Tt).
		Use a Punnett square to show how a 1:1 ratio of dominant:recessive phenotypes is obtained when crossing a heterozygous individual (Tt) with a homozygous recessive (tt).
		Use a Punnett square to demonstrate the 1:1:1:1 ratio obtained by crossing one individual that is heterozygous for two traits (TtRr) with one that is homozygous recessive for both traits (ttrr).
	www.uri.edu /artsci/bio/wetherbee/bio105/sg3.htm (513 words)

	Introducing Punnett Squares
		A Punnett square is a chart which shows/predicts all possible gene combinations in a cross of parents (whose genes are known).
		Using Punnett Squares, you can predict the genotypes and phenotypes of the offspring of a cross between a homozygous (purebred) tall pea plant and a homozygous (purebred) short pea plant.
		Write the possible gene(s) of one parent across the top and the gene(s) of the other parent along the side of the Punnett square.
	www.usoe.k12.ut.us /curr/science/sciber00/7th/genetics/sciber/punnett.htm (420 words)

	Punnett Squares [Athro, Limited: Biology: Genetics]
		A Punnett square is a simple graphical way of figuring out how the genes from each parent might combine to produce an offspring.
		The square has four boxes in it, fill each box with the allele above it from the mother, and the allele beside it from the father.
		In addition to showing the possible genotypes of offspring, the Punnett square also indicates how likely a particular child of this mating is to have a given genotype.
	www.athro.com /evo/gen/punnett.html (940 words)

	Basic Principles of Genetics: Probability of Inheritance
		It does not matter which parent is on the side or the top of the Punnett square.
		Each of the two Punnett square boxes in which the parent genes for a trait are placed (across the top or on the left side) actually represents one of the two possible genotypes for a parent sex cell.
		Punnett squares are standard tools used by genetic counselors.
	anthro.palomar.edu /mendel/mendel_2.htm (812 words)

	Punnett Squares, A Picture is Worth a Thousand Words by Dr. Carmen Battaglia (Site not responding. Last check: 2007-09-07)
		Notice that in the Punnett Square (Figure 1), the symbols for all the possible alleles carried by the male (sperm) are arranged along the top of the square, while all the possible alleles carried by the female are listed on the side.
		Using the Punnett Square, it is easy to see why a breeder might not know that two carriers were bred.
		Biologists around the world soon accepted the chromosome theory that the genes on the chromosomes are the units of inheritance, thereby laying the foundation for the use of the Punnett Square.
	www.caninechronicle.com /features/battaglia/battaglia-0802.html (1501 words)

	welcome to jason T wotton's instructional systems and technology site (Site not responding. Last check: 2007-09-07)
		The purpose of this project is to introduce and employ the Punnett square as a mathematical tool for predicting physical and genetic inheritances when employing Mendelian genetics.
		Since Punnett squares are a cornerstone in understanding basic genetic inheritances, any attempts to convince administration would be unnecessary.
		The Punnett square is new to the learners.The school is in an urban setting allowing their social and cultural diversity to positively influence learning.
	www.tc.umn.edu /~wott0005/CI5362/final/index2.htm (923 words)

	Lesson Plan Formats
		It is necessary to master the Punnett square in order to learn genetics.
		Using a Punnett Square allows you to predict the results of crosses.
		Handout Punnett Square Worksheet and have kids work on this in their groups.
	www.lehigh.edu /~infolios/veronica/instruction/lesson_4.htm (686 words)

	Punnett
		At the age of nine, Reginald Crundall Punnett, the eldest son of a middle-class builder, suffered a bout of appendicitis.
		Punnett also introduced a graphical method of representing hybrid crosses, now called the Punnett square.
		Punnett's interests also included the investigation of butterfly mimicry, the notion of one species mimicking another for adaptive advantage.
	faculty.kirkwood.edu /ryost/punnett.htm (758 words)

	Punnett Square
		Punnett squares involving monohybrid problems will contain 1 or 2 rows and 1 or 2 columns.
		The zygotes are represented by the "cells" of the square.
		This is the end of the lesson for Punnett squares.
	www.pc.vccs.edu /tureman-intro/biology/MendelianGenetics/punnettsquare.htm (885 words)

	Mendelism (Site not responding. Last check: 2007-09-07)
		To use a Punnett square, Take the parental genotypes, and determine all of the possible combinations of alleles that could occur in gametes.
		Then, within the square, combine all of the possible gametes from each parent to produce all of the possible combinations of alleles in the offspring.
		When gametes are combined to form new individuals (in the square), we see that 1/4 of the offspring should be DD, 2/4 (or 1/2) should be Dd, and 1/4 should be dd.
	www.emunix.emich.edu /~rwinning/genetics/mendel3.htm (445 words)

	Punnet Square
		Use a Punnett square to determine the probability of one of their offspring having short hair.
		Use a Punnett square to determine the probability of one of their offspring having a red color.
		Use a Punnett square to determine the probability of one of their offspring having a white color.
	glencoe.mcgraw-hill.com /sites/0078617340/student_view0/chapter5/math_practice.html (372 words)

	MCDB 2150 Lecture 22
		Punnett square: The Punnett square (introduced in the previous lecture) is a convenient method for analysis of the products of independent assortment of small numbers of unlinked genes.
		The Punnett square is a highly effective means for analyzing a dihybrid cross (figure 12.10), and also works reasonably well for a trihybrid cross (3 unlinked genes).
		In the ilustration that follows, the genotype is shown in each square, followed by the phenotype in parenthesis.
	www.colorado.edu /MCDB/MCDB2150Fall/notes99/99L22.html (1607 words)

	Home Labs: Monohybrid Lab
		The Punnett Square shows only the probability of what might occur and not the actual results.
		The Punnett square only shows the chances of what might occur each time the event is under taken.
		Objective: In this investigation you will use a Punnett square to predict the possible genotypes and phenotypes and their ratios from a monohybrid cross.
	www.troy.k12.ny.us /thsbiology/labs_online/home_labs/monohybrid_lab_home.html (368 words)

	Genetics: Punnett Squares \| eThemes \| eMINTS
		Learn about the Punnett squares chart and how it is used for successful breading and predictions of certain traits.
		Learn about Punnett Squares, how the chart is created, and how to work with it.
		Use this interactive Punnett squares to work with examples of probability in genetics: parents and children.
	www.emints.org /ethemes/resources/S00001476.shtml (703 words)

	Name: ___________________________________
		Punnett Square to figure out the possible gene combinations of offspring using a Punnett Square.
		Cross a plant that is heterozygous for green pods with a plant that has yellow pods.
		Complete the Punnett Square above by writing the alleles from the gametes in the appropriate boxes.
	www.lehigh.edu /~infolios/veronica/instruction/punnett.htm (433 words)

	[No title] (Site not responding. Last check: 2007-09-07)
		A Punnett Square is a chart that provides a means of predicting all the possible outcomes for combining genes in a cross between parents whose genes are known.
		Below is a step-by-step guide on how to construct a Punnett Square and figure out the different probabilities of offspring for a given trait.
		As described earlier, a Punnett Square is a chart that allows one to predict the possible outcomes when combining genes of two sexually compatible individuals.
	www.knowledgene.com /public/view.php3?db=fun_stuff&uid=50 (1558 words)

	Punnett Square Representation
		I drew the squares and did all of the calculations properly and obtained the correct answers.
		My professor claims that the proper way to complete a Punnett square is by circling each individual gamete representation in the diagram.
		Furthermore, some texts are not consistent when they illustrate the Punnett square, sometimes circling and sometimes not eg.
	www.newton.dep.anl.gov /askasci/mole00/mole00239.htm (528 words)

	punnetts
		The possible gene combinations in the offspring that result from a genetic cross can be determined by drawing a diagram known as a Punnett square.
		A Punnett square shows the genes (represented by letters) in the parents’ gametes along the top and left-hand side of a square and the possible gene combinations in the offspring, within the square.
		For each of the following problems, draw a Punnett square in the space provided and fill in the information on the indicated lines.
	www.lhs.logan.k12.ut.us /~asemadeni/punnetts.htm (1389 words)

	Mendel's Laws - Genetics and Analysis (Site not responding. Last check: 2007-09-07)
		Chlorophyll synthesis is controlled by a dominant allele "C": homozygotes for this allele and heterozygotes are green, while homozygotes for the recessive allele "c" are white.
		A Punnett square is a visual device that helps you understand what is happening in a cross and also what progeny genotypes to expect.
		The columns of the Punnett square represent the female contribution to progeny (through egg cells), and the rows represent the male contribution to progeny (through sperm cells).
	www.usd.edu /biol/labs/151/Lab1.htm (1998 words)

	Genetics Practice Problems
		Draw the Punnett square that illustrates this marriage.
		Assuming these genes are on separate chromosomes, draw the Punnett square for a cross between a homozygous fl, rough, short-haired Guinea pig and a white, smooth, long-haired one.
		If the man dies and the woman remarries to a colorblind man, draw a Punnett square showing the type(s) of children that could be expected from this marriage.
	biology.clc.uc.edu /courses/bio105/geneprob.htm (1955 words)

	Gene Expression: Beyond the Punnett Square, part n
		Since a standard deviation is the square root of the variance (let's keep it in intelligible units), you get an expected deviation of 1.73 d.u.s during each round of successful reproduction.
		The only moral is one should go beyond the Punnett Square abstraction where phenotypes have simple (monogenic) causes.
		Update: This applies to eye color as well, as I talked to an individual who claimed that their father had brown eyes, and mother green eyes, while they have blue eyes (and seemed sure of paternity based on other resemblences).
	www.gnxp.com /blog/2005/10/beyond-punnett-square-part-n.php (953 words)

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