Production of gamets

Advantages of sex in evolution
1. Over 99.9% of eukaryotes reproduce sexually
2. Is good for natural selection
  1. Sex can be favored when selection varies over space
  2. Sex evolves more readily when a species enviroment changes rapidly
Spermatogenesis
1. Process of espero cell development.
  1. Spermatocygogenesis
    1. Primitive cells proliferase by mitosis.
  2. Spermiogenesis
    1. Cells retain a rounded configuration Spermatids undergo a change in form during spermiogenesis.
Genetic Recombination in fertilization
1. Happens during meiosis
  1. In propase I of Meiosis I crossing over occurs when the double- stranded homologous pairs connect and exchange DNA.
Meiotic events
The maintenance of sexual reproduction in a highly competitive world has long been one of the major mysteries of biology given that asexual reproduction can reproduce much more quickly because 50% of offspring from sexual reproduction are males, unable to produce offspring themselves.

Resumen del Recurso

	Creado por Mimy Jurado hace más de 7 años