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10 Cards in this Set
- Front
- Back
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You have two sets of genes for different traits for peas.Y or y=color
R or r= skin If the parents genes are YyRr + YyRr. What kind of ratio will you get. |
9:3:3:1 ratio
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What is a test cross, and what is its purpose?
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A test cross is used to determine the genotype of an individual with the dominant genotype. To do this you cross the individual with the most recessive phenotype.
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What soes it mean to have genes that are homozygous?
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The genotype will contain the same alleles for a trait.(ex. tt, or YY)
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What is the principle of dominance?
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2 forms of the same gene which are present when the dominant allele is expressed.
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What does it mean when genes are autosomal?
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It means the genes are not sex linked.
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What is Mendle's principle of segregation?
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It means in meiosis two alleles separate so that each gamete recives only one form of the gene.
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Who is Gregor Mendle and what is he famous for?
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Mendle was a monk who studied the traits in peas.
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What is the addition rule for genetics?
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The addition rule is as follows; if two outcome are mutuall exclusive, the probability of either occuring is their sum.
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What is pleiotopy?
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It is a situation where one gene affects more than one phenotype.
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What is sex linkage?
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When a trait is sex linked, it will occur with greater frequency in one gender than the other.
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