Q. If a cross between two individuals produces offsprings with 50% dominant character (A) and 50% recessive character (a) the genotype of parents are :

Q. If a cross between two individuals produces offsprings with 50% dominant character (A) and 50% recessive character (a) the genotype of parents are :

1. Aa×Aa
2. Aa×aa
3. AA×aa
4. AA×Aa

Solution :

Correct option: B A cross is made between hybrid and homozygous recessive individual is called Test cross. It is used to determine, whether it is homozygous or heterozygous and also type of gametes produced during fertilization. In the next generation 50% progeny dominant character A and 50% progeny shows recessive character. The genotypes of the parents are Aa and aa. It is a test cross. So, the correct option is ‘Aa x aa’.