Crossing over contributes to genetic variation by exchanging chromosomal segments between non-sister chromatids of homologous chromosomes.
What is crossing over?
- Crossing over is the exchange and recombination of genetic components between the homologous chromosomes.
- This occurs in the pachytene stage of the meiosis-1 of the meiotic division.
- Crossing over occurs with the help of an enzyme and the enzyme responsible for crossing over is called Recombinase.
Thus, crossing over contributes to genetic variation by exchanging chromosomal segments between non-sister chromatids of the homologous chromosomes.
Learn more about crossing over: brainly.com/question/927405
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Lichen will colonize the bare rock.
Hi there!
Using the image below, you can see that all of the boxes are Tt, or heterozygous. Therefore, 1 = Tt, 2 = Tt, 3 = Tt, and 4 = Tt.
Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
The answer is blind impulse. This means the sudden and uncountable desire to do something. In the novel, Finny and gene have been each other's double from the beginning of the novel. Gene says to Finny the he would never have been good in the war, since he would have been willing to play basket ball with the foe instead of fighting. This brought Finny in to tears, and asks if Gene's part in the fall was just "blind impulse" and not a deliberate expression of hate.
