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22 Cards in this Set
- Front
- Back
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Homozygous
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Having identical alleles of a gene.
Ex: Homozygous Dominant - PP Homozygous Recessive - pp |
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Hybrid
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The offspring of a cross between two individuals that breed true for different forms of a trait.
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Phenotype
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An individual's observable traits.
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Dominant
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Refers to an allele that masks the effect of a recessive allele paired with it.
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Genotype
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The particular alleles carried by an individual.
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Heterozygous
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Having two different alleles of a gene.
Ex: Pp |
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Punnett Square
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Diagram used to predict the outcome of a cross.
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Recessive
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Refers to an allele with an effect that is masked by a dominant allele on the homologous chromosome.
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Dihybrid Cross
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Individuals identically heterzygous for two genes are breed together.
Ex: AaBb x AaBb |
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Incomplete Dominance
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Condition in which one allel is not fully dominant over another, so the heterzygous phenotype is between the two homozygous phenotypes.
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Bell Curve
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Bell shaped curve; typically results from graphing frequency versus distribution for a trait that varies continuously in a population.
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Continuous Variation
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A range of small differences in a shared trait.
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The observable traits of an organism constitute its.......
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Phenotype
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The genotype of a pure-breeding black cat (black is dominanat to white in cats) is.........
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Homozygous Dominant (BB)
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The offspring of a cross AA x aa are......
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Heterozygous
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Albinism (n) is a recessive to normal pigmentation (N), therefore someone who has albinism has what genotype.......
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Homozygous Recessive (nn)
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If a person is heterozygous for the trait "widow's peak" that is telling you their......
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Genotype
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Assuming alleles have a clear dominance relationship, a dihybrid cross leads to a phenotypic ratio in offspring that is close to:
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3:1
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Mendel crossed a pure bredding pea plant with green pods and a pure breeding pea plant with yellow pods. All offspring had green pods. Which color is recessive........
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Yellow
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In sweet pea plants purple flowers are dominant to white flowers. Cross a pure breeing white with a pure breeding purple:
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a. Show the genotype of the parent plants.
b. Do a punnet square on the back and list the genotypes of the offspring. c. List the possible phenotypes of the off spring. |
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Four o clock flowers show incomplete dominance. A cross between a red and white flowered plant produces only pink flowered off spring. On the back cross two pink flowered plants.
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a. What are the genotypes of the off spring.
b. What are the phenotypes of the off spring. |
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Color blindness is a sex linked trait. A woman who is a carrier for color blindness has a child with a man who is not color blind.
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a. List the genotpes of the boys.
b. List the genotypes of the girls. c. What are the chances of any child being color blind. |
