Home › Maharashtra HSC Class 12 (Science) › biology › Inheritance and Variation › Independent assortment is demonstrated by a dihy…
Independent assortment is demonstrated by a dihybrid cross resulting in a phenotypic ratio of
A9 : 3 : 3 : 1
B3 : 1 (typical)
C1 : 2 : 1
D12 : 4
Answer & Solution
Correct answer: A. 9 : 3 : 3 : 1
1. In a dihybrid cross AaBb × AaBb, alleles of A assort independently from those of B.
2. Four gamete combinations occur in each parent giving 16 offspring combinations.
3. The classic 9 : 3 : 3 : 1 phenotypic ratio confirms independent assortment.
_Source: Maharashtra Balbharati Std XII Biology, Ch 3 "Inheritance and Variation" §3.4_
Related questions
Down syndrome in humans is caused byCrossing over occurs during which stage of meiosis?In Drosophila, the linkage groups equal thePleiotropy refers toSex linked inheritance is exemplified byCodominance is best illustrated byIncomplete dominance is characterised byA monohybrid cross between two heterozygotes (Tt × Tt) gives a phenotypic ratio of