Question

What type of gamete genotypes can be formed from individuals of the following genotypes? a) aa b) AaBB c) AaBbcc d)AaBbCc e)aaBbccDDEE

Answer 1

a) aa

is homozygous for the allele a

this can produce only one type of gamete, the genotype of the gamete is a.

b) AaBB

is heterozygous at the A locus,

number of different types of gametes can be produced= 2^ number of heterozygous loci

so it can produce 2^1= 2 types of gametes

number of different types of gametes= 2

c) AaBbcc

is heterozygous at B and A loci

number of different types of gametes can be produced= 2^ number of heterozygous loci

number of different types of gametes can be produced= 2^2=4

number of different types of gametes=4

d)AaBbCc

is heterozygous at A, B and C loci

number of different types of gametes can be produced= 2^ number of heterozygous loci

number of different types of gametes can be produced= 2^3=8

number of different types of gametes=8

e)aaBbccDDEE

is heterozygous at B locus

number of different types of gametes can be produced= 2^ number of heterozygous loci

number of different types of gametes can be produced= 2^1=2

number of different types of gametes=2