13. Mendelian Genetics

Punnett Squares

13. Mendelian Genetics

Punnett Squares

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How to Use Punnett Squares

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07:01

GCSE Biology - Genetic Diagrams #73

How to do a Punnett square with puppies

Punnett Square Basics | Mendelian Genetic Crosses

Monohybrids and the Punnett Square Guinea Pigs

Genotypes, Phenotypes and Punnett Square

Andrey K

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Practice this topic

Multiple Choice

Mendel found that green pea pod color (y) was recessive to yellow pea pod color (Y). For the cross Yy × yy, what percentage of offspring are expected to be yellow?

A female dog with black fur (Ff) mates with a male dog that also has black fur (Ff). Determine the possible genotypes and phenotypes of their puppies using a Punnett Square. Black fur (F) is dominant to grey fur (f).

a) # of possible Genotypes:

FF: ________

Ff: ________

ff: _________

b) % of possible Phenotypes:

Black fur: __________

Grey fur: ___________

In garden peas, yellow seeds (Y) are dominant to green seeds (y), and inflated pods (I) are dominant to constricted pods (i). Suppose you have crossed YYII parents with yyii parents. Draw the F2 Punnett square. Based on this Punnett square, predict the expected phenotype(s) in the F2 generation and the expected frequency of each phenotype.