Question

1. Suppose that you are studying coat colour (black vs. grey) in a wild population of rabbits

a.

Crosses between various pairs of black rabbits produce all black offspring. Is it possible to

conclude that black is the dominant trait?

b. Crosses between various pairs of black and grey rabbits produce F1s that are both black

and grey. Is it possible to conclude how the traits are inherited based on these results?

c. Crosses between the F1s in b. sometimes produce grey rabbits. Is it possible to conclude

how the traits are inherited based on these results?

Answer 1

a. to understand the dominance, lets take an example,

when a cross between tall tree and small tree is done, then the ratio of tall trees is higher in F1 generation in compare to small trees. this means, trait of tall trees is dominant over small trees. thus, dominant trait mask the apperance of recessive trait

crosses are done in between various pairs of black rabbit, if all the pairs are homozygous then black offspring is the only option

but if the crosses between the heterozygous black parents is done and all offspring are black, then it means black is the dominant trait.

b. Inherited traits are the traits which are obtained from parents or grandparents. this means that one or more family members already possess it.

when crosses between black and grey pairs produce both black and grey in F1 generation, then, it may be possible that the traits are inherited from parents.

c. If crosses between F1 containing black and grey pair is done and if it is producing grey, then it means grey is dominant over black.