Class 10 Science Biology Heredity and Evolution
A brown-eyed couple has a blue-eyed child. The trait of brown eye is dominant over that of blue-eyed . What is the genotype of the couple?
(a)
Bb Bb
(b)
BB BB
(c)
BB Bb
(d)
BB bb
Correct answer: (a) 
Solution: 
  • B is the dominant gene for the brown colored eye.
  • The genotype of the couple is Bb x Bb because only this combination can give 25% probability of bb genotype in progeny which accounts for blue eyes.
  • So, the correct answer is 'Bb ×× Bb'.

widgit image
Connecting you to a tutor in 60 seconds.
Get answers to your doubts.
play store logo
apple store logo
Similar topics
components of food
why do we fall ill
heredity and evolution
diversity in living organism
heredity and evolutio
widgit image
Connecting you to a tutor in 60 seconds.
Get answers to your doubts.
play store logo
apple store logo
components of food
why do we fall ill
heredity and evolution
diversity in living organism
heredity and evolutio