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Meiosis
Cell Reproduction TEST
Term | Definition |
---|---|
Meiosis | A special process that produces haploid gametes from diploid cells |
Gamete | special reproductive cell with one set of chromosomes (haploid) |
Zygote | is produced when the gamete from one parent is combined with the gamete from the other parent |
Fertilization | occurs when two gametes combine to form a zygote |
Haploid | cell that only has one set of chromosomes (not paired) |
Diploid | cell that has two sets of chromosomes (pairs) |
Fragmentation | asexual reproduction in which the body breaks into two or more pieces which then grow into complete adults |
Budding | new individuals split off (sprout) from existing ones |
Asexual Reproduction | when one parent reproduces (offspring are genetically identical) |
Sexual Reproduction | when two parents combine DNA to produce offspring (fertilization) |
Advantage of sexual reproduction | Genetic diversity |
Disadvantage of sexual reproduction | You have to find a mate, uses lots of energy and resources |
Sentence #1: Fertilization, Haploid, Diploid, Gamete, Zygote, egg, sperm | Fertilization is when two haploid gametes, known as egg and sperm, combine to form a diploid zygote |
Sentence #2: Meiosis, Gametes, Diploid, Haploid | During meiosis a diploid cell divides twice to from four haploid gametes |
Disadvantage of asexual reproduction | No genetic variation (all offspring are identical to parents) |
crossing over | homologous pairs exchange segments of DNA |
independent assortment | homologous pairs line up randomly before they are separated |
sources of genetic diversity during meiosis | crossing over and independent assortment |
homologous pairs | paired chromosomes that are similar in size, shape and the genes they contain |