Cellular junctions: by connecting cells to their neighbors
Receptors: allowing cells to respond to chemical messages
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To answer your question
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<span>During the development of
a gamete, the two alleles of the P generation separate. Each gamete carries one allele from each
parent which randomly pairs in the F1 generation. This mechanism repeats when
F1 plants cross and yield F2 plants. The
outcome of the F2 generation would then have new combinations of alleles which
can be different compared to the preceding generations.</span>
Habitat is a place in which an animals lives
A niche is the organisms place or job in the environment
