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Chapter 13

Meiosis & the Sexual Life Cycle BSC1010

What is the purpose of meiosis (producing gametes)? Sexual reproduction
How many chromosomes in a human gamete (egg or sperm)? 23
Another name for sex cells (eggs & sperm): Gametes
What are the female sex chromosomes? Another name for sex cells (eggs & sperm):
Explain how crossover occurs? (Between what portions of chromosomes) Non-sister chromatids of homologous chromosomes
The processs of meiosis and gamete formation in females. Oogenesis
Compared to mitosis, how many stages of meiosis are there? Eight (4 -PMAT I and 4 PMAT II)
Name all 3 cell types which are haploid during meiosis in females. Secondary oocyte, ovum and polar bodies
What is the purpose of crossover during meiosis? Genetic Mixing (Recombination)
Total number of chromosomes in a human diploid cell. 46
Name all 3 cell types which are haploid during meiosis in males. Secondary spermatocytes, spermatids, sperm
The primary germ cell in female humans (diploid). Oogonium
What are the male sex chromosomes? XY
The nuclear division mechanism whereby the daugher cells are haploid. Meiosis
Alternative forms of the same genes are called _______. Alleles
The processs of meiosis and gamete formation in males. Spermatogenesis
The type of cells which will undergo meiosis. Germ Cells
The primary germ cell in male humans (diploid). Spermatogonium
Created by: mikec35-pbsc
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