100 POINTS I am asking 2 questions because im giving so many points...

1. Describe the first hypothesis that scientists have about blindness in the Mexican tetra. Be sure to discuss pleiotropy in your answer.\

2. One effect of the Hedgehog gene is to make cave tetras go blind. What is another effect it might have?

these are odd questions

Explanation:

1. they are curious about how they get blind

2. the quills

1. It is called the Mexican tetra. The scientists have come up with two possible explanations for the fish's blindness. The explanations will probably help them to understand other cave fishes as well. The scientists' first hypothesis is that blindness gives the fish some sort of evolutionary advantage, but not directly.

Explanation:

2. The scientists did indeed find one of those genes. It is nicknamed Hedgehog or the Hh gene. They discovered that this gene does more than cause blindness in cave tetras. ... That is because the same mutation in one gene (the master switch) has more than one effect (blindness and an improved sense of smell).

thx for points :)))

it takes hundreds of years to become stable.

if you have another question lmk.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?