Answer:
In synapsis, the genes on the chromatids of the homologous chromosomes are precisely aligned with each other. An exchange of chromosome segments
Explanation:
Radiometric dating reveals the exact (i think its exact) age of a fossil.
B.cytoplasm thats the answer
Your answer should be A. Protons. Hope this helps! =^-^= (Student btw)
The chromosomes in the sex cells would be half the chromosomes in the body cells; so since each body cell has 40 <span>chromosomes and half of that is 20, there's your answer. It's B. 20</span>
