Question

What type of offsprings will be produced by the hybridisation of a horse with 64 chromosomes and a zebra with 46 chromosomes?

• A. Fertile, with 46 chromosomes
• B. Fertile, with 55 chromosomes
• C. Sterile, with 46 chromosomes
• D. Sterile, with 55 chromosomes
• E. Sterile, with 64 chromosomes

Answer 1

The correct option is D Sterile, with 55 chromosomes

A horse with 64 chromosomes will make gamete carrying 32 chromosomes while gametes of zebra (46 chromosomes) will carry 23 chromosomes. Fusion of gametes of horse and zebra will make a zygote carrying 23+32= 55 chromosomes. So, the offspring will have 55 chromosomes. Thus, the correct answer is option D.