BCH447H1 Lecture Notes - Lecture 7: Pleurothallis, Wild Type, Chromosome

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22 Apr 2014
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The evolution of sex we are not talking about sex. We are talking about the reasons behind why sex developed. With yeast we get haploid yeast and they can replicate and make more haploids Furthermore, the yeast also have a sequence that defines a sex Some are a type and others are alpha type sex. It isimagined that in the beggining it was two different genes But the two different mating types can come together, fuse and form a diploid cell. And those diploid cells can also divide mitotically and keep surviving. The diploid cell will undergoe meiosis and form 4 spores usually form during difficult conditions. The question is, what is the advantage of going diploid and then going haploid again. Are diploid cells better off then haploid cells. Keep in mind that prokaryotes are still here So the question is why do eukaryotes mainly do sexual haploid diploid stuff perhaps being diploid helps mask recessive genes

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