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biology (punnett square: a punnett square is a square that scientists use…
biology
punnett square: a punnett square is a square that scientists use to determine the possibility of offspring having a particular genotype.
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reproduction
sexual
(MALE and FEMALE) when a new organism is created from two parents, sperm from the male and an egg from the female- sex cell combine to form a new organism - fertilization - then it gets 23 chromosomes from the Male and 23 chromosomes from the Female.
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selection
natural selection: its when a species experiences change in its environment and adapts to it. when an increase of blue fish are being eaten the red fish species would increase because of natural selection.
artificial selection: intentional breeding of animals or plants. lets say dog owners wanted to keep a chain of purebreds then they would get two purebred dogs and breed them to get another purebred dog, and so on.
chromosomes
humans have 23 pairs, 46 total chromosomes - they are made of nucleic acid and proteins found in the nucleus cell. they carry genetic info in the form of genes
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recessive trait : the gene that is not visible, but is still there
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