Lab 3.10 Dihybrid Cross
(Q008) What is the likelihood that Suzy and José's child will have freckles and a widow's peak?
24%
(Q004) What is the likelihood that Suzy and José's child will have freckles but will not have a widow's peak?
25%
(Q006) What is the likelihood that Suzy and José's child will not have freckles but will have a widow's peak?
25%
(Q010) What is the likelihood that Suzy and José's child will not have freckles or a widow's peak?
25%
(Q001) So far, you have worked on Punnett squares that show monohybrid crosses- likelihoods for an offspring from two parents involving a single trait, such as tongue rolling. When conducting his research, Mendel devised a method known as a dihybrid cross, which allowed him to consider two different traits. Mendel's work on dihybrid crosses in pea plants helped him realize that traits are inherited separately (the law of independent assortment).Review Scenario A on p. 77 of your lab manual to see an example of a dihybrid cross with Mendel's pea plants and how to interpret the outcomes of such a cross. Then work through Scenario B on pp. 78 of your lab manual.Consider two traits in humans: freckles (F) and widow's peak (W). Having freckles (F) is dominant over not having freckles (f), and having a widow's peak (W) is dominant over not having a widow's peak (w).• Suzy is heterozygous for freckles and widow's peak.• José is homozygous recessive for freckles and widow's peak.• Suzy and José are about to have a baby, and they are curious about the likelihood that their child will inherit these traits.Use this information to fill in the Punnett square on p. 78 and answer the following questions.What is Suzy's genotype?
FfWw
(Q007) What is/are the possible genotypes for a child of Suzy and José that will have freckles and a widow's peak?
FfWw
(Q003) What is/are the possible genotypes for a child of Suzy and José that will have freckles but not a widow's peak?
Ffww
(Q005) What is/are the possible genotypes for a child of Suzy and José that will not have freckles but will have a widow's peak?
ffWw
(Q002) What is José's genotype?
ffww
(Q009) What is/are the possible genotypes for a child of Suzy and José that will not have freckles or a widow's peak?
ffww
