Question

In sexual reproduction, the variation among offspring, and the fact that they are genetically different from their parents, is due to which of the following?

a) random alignment of homologues during meiosis 1
b) crossing over
c) random process of fertilization
d) all of the above contribute to genetic variability in sexual reporduction

i think it would be all of the above but i'm really not sure. please help! thank you to anybody that answers!!

Answer 1

We don't have a biology tutor here at present. All the tutors are volunteers, and nobody with a biology background is volunteering. My "gut" tells me you are right, but I'm no expert. This should help:

http://b4fa.org/bioscience-in-brief/introduction-genes-crops/how-does-sexual-reproduction-generate-genetic-variation/