In a dihybrid cross ( AaBb × AaBb ), the phenotypic ratio of the offspring is: - Biology MCQ Biology | ExamTest.live | ExamTest.live

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In a dihybrid cross (A a B b \times A a B b), the phenotypic ratio of the offspring is:

A $3 : 1$
B $1 : 2 : 1$
C $9 : 3 : 3 : 1$
D $1 : 1 : 1 : 1$

Solution & Step-by-step Explanation

According to Mendel's Law of Independent Assortment, a cross between two individuals heterozygous for two traits (A a B b) results in a phenotypic ratio of 9 : 3 : 3 : 1 (9 Dominant for both, 3 Dominant for one, 3 Dominant for the other, 1 Recessive for both).

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In a dihybrid cross (A a B b \times A a B b), the phenotypic ratio of the offspring is:

A

3 : 1

B

1 : 2 : 1

C

9 : 3 : 3 : 1

D

1 : 1 : 1 : 1

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Genetics Dihybrid Cross

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