Consider the genes for pea color (the "Y" gene) and pea height (the "T" gene). For the "Y" gene, the Y allele = yellow peas and the y allele = green peas; for the "T" gene, the T allele = tall peas and the t allele = short peas. Draw and fill in a Punnett Square for a dihybrid cross of two pea plants that both have the genotype Yy Tt. What is the expected phenotype frequency of Yellow and Tall offspring?

Question

Biology

Jameson

4 April, 07:39

Consider the genes for pea color (the "Y" gene) and pea height (the "T" gene). For the "Y" gene, the Y allele = yellow peas and the y allele = green peas; for the "T" gene, the T allele = tall peas and the t allele = short peas. Draw and fill in a Punnett Square for a dihybrid cross of two pea plants that both have the genotype Yy Tt. What is the expected phenotype frequency of Yellow and Tall offspring?

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Harry James · Answer 1

9/16 = tall and yellow offspring

Explanation:

Two dihybrid pea plants for color and height are crossed to obtain the progeny. The genotype of both the parents is "TtYy".

Each of the dihybrid parent will form four types of gametes in 1:1:1:1 ratio = TY, Ty, tY and ty. A random fusion of gametes from both the parents would give a progeny in following phenotype ratio=

9 tall and yellow: 3 tall and green: 3 dwarf and yellow: 1 dwarf and green