Va rog ajutor cu aceste intrebari​

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

hope this : )

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: