BIOL 1020 Lecture Notes - Lecture 15: Spermatid, Spermatocyte, Egg Cell
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BIOL 1020 Full Course Notes
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Document Summary
Four chromosomes means two homologous pairs of chromosomes. Have the same size, shape, and hereditary info. (encoded in genes in the. Asexual life cycle: ex: starfish which eat oysters can regenerate through an asexual means. In asexual reproduction you increase the number of organisms in the population but you do not increase the genetic diversity. What determines which order the chromosomes line up in during metaphase. Whenever you manufacture sperm chances are the sperm that are finally formed the sperm will have a mixture of chromosomes from each of your parents. The way the chromosome pairs line up in metaphase i is called independent. Assortment= one way of increasing genetic diversity in the way the nuclei are formed. Crossing over- the position of a gene on a chromosome is its locus (loci= During prophase i chromosomes come together by synapsis and at this time some genetic material is exchanged between them creating a recombinant (a new combination of genes).