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genetics part 1 quiz

study guide for first genetics quiz

QuestionAnswer
meiosis it allows the gametes to have half the original number of chromosomes
sexual reproduction produces variation in species by providing an independent assortment of the chromosomes
sex linked trait carried on the x chromosome, passed from mother to son.
mutations variation (changes) in DNA, can be good or bad, can only be passed to offspring if the occur in a gamete (sex cell)
DNA codes for proteins by arranging certain nitrogen bases of the cell in a particular order
X-rays cause mutations by changing the sequence of nitrogen bases in DNA
Genotype XY male
Genotype XX female
Shaded square in a pedigree male with the disease
circle not shaded in a pedigree female without the disease
half shaded circle or square in a pedigree female or male carrier
phenotype physical appearance of a trait
genotype allele (letter) combinations of a trait
heterozygous one capital and one lowercase letter
dominate capital letter masks the recessive trait
recessive lower case letter, must have 2 to see the phenotype (trait)
homozygous 2 capital or 2 lowercase letters
Created by: TeresaGentry
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