Punnett square


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Punnett square

 [pun´et]
a graphic depiction in grid form of how genes from each parent might combine in an offspring.
Punnett square showing sex chromosome combinations for male and female gametes. From Mueller and Young, 2001.

Punnett square

Etymology: Reginald C. Punnett, English geneticist, 1875-1967; OFr, esquarre
a matrix that shows all of the possible combinations of male and female gametes when one or more pairs of independent alleles are crossed. Letters representing the male and female gametes are placed along the left side and the top of the matrix, respectively. The genotypes of the offspring produced by each pairing of gametes occupy the cells in the matrix. See also pedigree.
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Punnett square
Punnett squareclick for a larger image
Fig. 262 Punnett square.

Punnett square

a table devised by the British geneticist R. Punnett, in which all possible combinations of gametes and progeny are displayed in a grid structure. For example in the cross:

Aa, Bb x aa, Bb

the Punnett square would be as in Fig. 262.

Punnett,

Reginald Crundall, English geneticist, 1875-1967.
Punnett square - a grid used in genetics. Synonym(s): checkerboard
References in periodicals archive ?
In this way, simple illustrations incorporate a considerable amount of information that provides the opportunity to determine genotype and phenotype probabilities for monogenic Mendelian traits without the need to draw Punnett square for every parental genotype combination.
Following the same procedure as the monohybrid test, students build the Punnett square using the mathematical concept in Table 4.
A Punnett square visually demonstrates how alleles for a given trait from two parents segregate.
Question: What percent of the kittens in the Punnett square below will exhibit polydactyly, a dominant trait?
But the Punnett Square illustrates the odds of any color emerging.
The students were instructed to find the genotypes of the parents and child, using a Punnett square to demonstrate how their answers were determined.
A chart called a Punnett square helps determine the types of traits an offspring can inherit.
There are a few minor details that could have clarified certain ideas for laymen, such as a traditional Punnett square to help illustrate crosses more clearly, simplified definitions (a phenotype is defined here as "a manifestation of a genotype," which isn't a very clear definition for the layman), and a better explanation of dominance/recessiveness, for example.
I first ask: "Based on a Punnett Square, what are the odds that a carrier of a new mutation will leave carrier descendants?
We're studying Punnett squares in science class, and every time we have a lesson, I get so bored I zone out.
in Springfield; participants will learn about traits and heredity and use Punnett squares and monster-parent-genotypes to design their own monster babies; free; recommended for ages 8 to 14.
Here, students can practice Punnett squares and observe certain genes that are dominant or nondominant and how that affects heterogeneous or homogenous pairs.