In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that: [NCERT Exemplar]
(a) The alleles of two genes are interacting with each other.
(b) It is a multigenic inheritance.
(c) It is a case of multiple allelism.
(d) The alleles of two genes are segregating independently.
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Answer:
D
Explanation:
Answer: The correct answer is D) The alleles of two genes are segregating independently.
According to Mendelian inheritance, a dihybrid cross is a cross that involves two different traits ( like shape and color of seed in pea plant). Every trait is governed by a specific gene that has two alternative forms called alleles.
The 9:3:3:1 is a classical Mendelian ratio that is obtained from a dihybrid cross in which parents are heterozygous for both the genes.
It represents all the possible four phenotypes, which inturn proves that during gamete formation, alleles of two different genes are separated independent of each other.
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