Question

How many types of zygotic combinations are possible between a cross Aabbccdd × aabbccdd ?

Answer 1

Zygotic combinations :

1. The number of zygotic combinations in any cross can be known by the number of heterozygous alleles in the genotype.
2. So, the number of gametes that can be produced = 2ⁿ
3. Here 'n' is the number of the heterozygous allele in the parental genotype.
4. Applying the above formulae:

1. The number of gametes that can be produced by the parent with genotype Aabbccdd = (2)¹ = 2
2. The number of gametes that can be produced by the parent with genotype aabbccdd = (2)⁰ = 1
3. The number of zygotic combinations that are possible after cross

= gametes of parent 1 × gametes of parent 2

= 2 × 1 = 2

So, the number of possible zygotic combinations in the above cross is 2.