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27 Cards in this Set
- Front
- Back
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how many pairs of autosomal chromosomes are found in a man
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22 pairs
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how many pairs of sex chromosomes are found in a man
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one
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what term is used to discribe the failure of homologous chromosomes to separate during meiosis
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nondisjunction
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a family consisting of a father mother son and daughter is evaluated for color blindness. the son is the only one affected what is his genotype?
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XᵇY
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a family consisting of a father mother son and daughter is evaluated for color blindness. the son is the only one affected. what is the genotype of the father
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XᴮY
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a family consisting of a father mother son and daughter is evaluated for color blindness. the son is the only one affected. what is the genotype of the mother
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XᴮXᵇ
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a family consisting of a father mother son and daughter is evaluated for color blindness. the son is the only one affected. what is the genotype of the daughter
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XᴮXᵇ
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if an individual exhibits an autosomal dominant trait do you know the genotype? why?
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noo we dont know whether or not she is a carrier of the recessive gene because e dominant gene masks it
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you are completing a genetics study in which two pairs of alleles are followed from the parental generation to the offspring what is your expected phenotypic ratio for these traits in the F1 generation
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9:3:3:1
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a blue eyed man marries a heterozygous brown eyed woman. if brown eyes are dominant to blue eyes what is the probability they will have a brown eyed child?
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50%
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a blue eyed man marries a heterozygous brown eyed woman. if brown eyes are dominant to blue eyes what is the browneyed childs genotype?
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Bb
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a blue eyed man marries a heterozygous brown eyed woman. if brown eyes are dominant to blue eyes what is the probability they will have a blue eyed child?
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50%
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a blue eyed man marries a heterozygous brown eyed woman. if brown eyes are dominant to blue eyes what is the blue eyed childs genotype
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bb
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a woman with blood type A has a child with blood type O. is it possible for the father to have blood type A
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yes because he could be Iᴬi
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a woman with blood type A has a child with blood type O. is it possible for the father to have blood type O
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yes ii
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a woman with blood type A has a child with blood type O. is it possible for the father to have blood type AB
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no
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a woman with blood type A has a child with blood type O. is it possible for the father to have blood type B
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yes Iᴮi
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Allele
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alternative genes for the same characteristic
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Homozygous
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the same (example AA or XᴮXᴮ)
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Heterozygous
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diffrent (example Aa or XᴮXᵇ or FᴬFᴮ)
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Genotype
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the genetic makeup of an organism (what you are example AA)
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Phenotype
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what you see vs what you are example you are Aa but you see AA because a is recessive
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double factor cross
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genetics study of 2 pairs of alleles that are followed from the parents to the children
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independent assortment
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2 or more sets of alleles are involved
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carrier
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has both the dominant and recessive allele example Aa
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epistasis
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one set of allels can mask the presence of a diffrent set of alleles
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polygenic inheritance
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2 or more genes combinde their effects to determine the phenotype
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