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15 Cards in this Set
- Front
- Back
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Define:
Principle of Independant Assortment |
Each trait is inherited independant of other traits.
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Define:
Dihybrid |
When considering two different traits at once.
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What was Mendel's word for 'gene'.
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Factor
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Define:
Epistasis |
When one gene hides the expression of another gene.
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What would be the blood type of a person with homozygous recessive alleles. (ii)
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O type blood
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What are pedigrees and what are they used for?
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Pedigrees are used to trace inheritance of a trait over several generations, and look like a family 'tree'.
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Define:
Autosomal Sex-linked |
Autosomal-each gender just as likely to inherit a trait. (not sex-linked)
Sex-linked-one gender more likely to inherit a certain trait. (not autosomal) |
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What word explains why A and B can combine to form AB type blood?
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Co-dominance
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When there is a 6% chance of crossover between pieces of genetic information, how close are these pieces to each other? (Include the units)
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6 map units
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How many different gametes can be formed from:
GgRRJj |
GRJ, GRj, gRJ, gRj
A total of 4 gametes can be formed. |
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Are X-linked abnormalities more common in males or females?
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Males, because there is no way to 'hide' these abnormalities with another X chromosome the way a female can.
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What is the scientific name for the fruit fly, which is used so often in genetic studies?
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Drosophila
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When considering a homozygous dominant being crossed with a homozygous recessive, why does the F1 generation never show characteristics of the homozygous recessive in a simple dominance relationship?
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The F1 generation always inherit a dominant allele from the homozygous dominant, therefore the offspring can only be a carrier of the recessive allele.
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Why cannot a male be carrier of a sex-linked trait?
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Males cannot hide sex-linked traits because they have X and Y. They must express BOTH of these chromosomes, and traits aren't hidden like when considering a female
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Can the environment alter your genetic makeup?
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No
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