Answer:
D. they are usually dominant or recessive.
Explanation:
alleles are pairs of genes found on a particular spot a chromosome. If one is dominant over the other it give rise to a particular trait.
If you use a punnet sq. and cross the parents you see that all the children should be affected. by this thing represented by black.
In this case the objects must be touching
The female sex hormones are estrogen and progesterone.
Hope that helps!
