Natural selection act directly upon <u>Alleles</u>
Explanation:
Genes, such as that of fur color, have many variants called alleles. Natural selection act on the alleles and chooses the best fit for an environment and eliminates the disadvantageous ones from the population over generations. Mutations are a rare occurrence that increases the number of allelic variants of a genes on which natural selection can act upon.
<span>A gamete needs only half the number of chromosomes because two gametes join together hope his helps you
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Answer: While active transport requires energy and work, passive transport does not.
Explanation:
<span>The detection of chromosomal abnormalities occurs at the G1 stage. This is when the cell has to commit to the process of the rest of the cycle. Thus, if any abnormalities are detected the process can be delayed or stopped entirely.</span>
