Question

black lab is dominant over chocolate lab. normal vision is dominant over blind vision. if you crossed a heterozygous black lab with normal vision with a blind chocolate lab. what percentage of the puppies would you expect to be chocolate with normal vision?

Answer 1

25%

Step-by-step explanation:

Dogs with bNbn are chocolate with vision

BNbn are normal vision & black

Bnbn are black & blind

bnbn are chocolate and blind

B = black (dominant)

b = brown

N = Normal Vision (dominant)

n = blindness

Dog one Heterozygous normal sight BbNn

Dog two Homozygous recessive blind bbnn

In this case since one parent is homozygous recessive for both traits is causes the odds of having a bling dog to increase greatly. :(

Hope this helps!! :) good luck with your studies.