When it’s summer in the Northern Hemisphere, what season is it in the Southern Hemisphere?

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the females possess the trait. mating two of the f1 fish fails to produce females with the trait. explain the inheritance pattern of the trait.