Meiosis
Meiosis= A process in cell disagreement during which the number of chromosomes decreases to one-half the original number by both divisions of the pith, which results in the production of sex cells
Prophase I= Chromosomes become visible, nucleus envelope breaks down, crossing over occurs.
Metaphase I=pairs of homologues chromosomes
Anaphase I= homologues chromosomes moves to setback poles of the cell
Telophase I / Cytokinesis=chromosomes gather at the poles, cytol divides.
Prophase II= a new spindle forms around the chromosome
Metaphase II= Chromosomes contention up at the equator
Anaphase II= Centromeres divide, chromatids move to opposite poles of the cell.
Telephase II / Cytokinesis= nuclear envelope forms around each set of chromosomes, cytoplasm divides.
The daughter cells from meiosis the daughter cells can be antithetical and in mitosis, the cells are exact copy.
Random Fertilization= from each one gamete has a unique set of combination of genes. A masculine gamete can fertilize any of the young-bearing(prenominal) gametes. The fertilization amidst a male gamete and a female gamete occurs randomly in the Fallopian tube.
As a result, each zygote is unique and therefore variation occurs due to the different combination of genes from the male and female gamete
spermatozoonatogenesis=process which sperm are produced in male animals
Sperm=four cells change in form and develop a tail to become male gametes called sperm.
Oogenesis= process which gametes are produced in female animals
Ovum=egg, which comes from the uneven cell split in meiosis II
A Sexual Reproduction= single enhance passes copies of all of its genes to each of its offspring, some plants, hammerhead shark and the shady tip shark are examples
Sexual Reproduction= cardinal parents each form reproductive cells that have one half the number of chromosomes. Humans, some plants and mostly everything else are examples
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