homologous pair, bivalents, germ cell-definition?

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student12
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homologous pair, bivalents, germ cell-definition?

Post by student12 » Sat Jul 01, 2006 11:05 am

Can someone tell me the definition of:

homologous pair-does this refer to the 2 chromatids conected by the one centromere ie: 'X' or does it refer to 2 of the same chromosome ie: 'XX', if so than it can also be as 'II' (chromosome not replicated yet...)

bivalents: refers to a pair of chromosome temporarily united. Does this mean 'X' or 'XX'?

germ cell: are these gametes or are they precursor gametes, ie>they will become gametes?

Thank you.

chloe18
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Post by chloe18 » Fri Jul 21, 2006 7:02 am

Homologous pairs are paird of whole chromosomes which can become joined at regions called chiasmata during meiosis. When they do join, the whole structure containing the two homologous chromosomes is called a bivalent. A germ cell is simply a beginner cell from which all daughter cells are made

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