Biology
Grade-8
Easy

Question

Fill in the missing alleles based on the given genotype.

  1. AaBB,aabb,aaBB,AAbb
  2. AABB,aabb,AaBb,aaBb
  3. aaBb,aabb,Aabb,AAbb
  4. AABB, AAbb, aaBB, AaBb

hintHint:

Genotype of the offspring is obtained by crossing the genes present in the left column with the genes in the upper row of the Punnett square.

The correct answer is: AABB, AAbb, aaBB, AaBb


    • In a Punnett square, the upper row represents alleles for the female gametes.
    • The left column represents the alleles for the male gametes.
    • In the given Punnett square, the cross between:
    1. AB & AB produces AABB
    2. Ab & Ab produces AAbb
    3. aB & aB produces aaBB
    4. ab &AB produces AaBb