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15 Cards in this Set
- Front
- Back
- 3rd side (hint)
Describe incomplete dominance. |
A heterozygous organism that is a BLENDING of the homozygous parents. i.e. R’R’, MM’, F’F |
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How do you recognize incomplete dominance in a Punnett Square? |
Two capital letters with one or two tick marks (‘) or prime marks. |
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Describe codominance. |
Both alleles shown in a heterozygous organism. |
i.e. BW |
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Describe simple recessive inheritance. |
Only one phenotype. Have to have both alleles. |
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Describe dominant inheritance. |
One phenotype. Always so in heterozygous. |
i.e. BB, PP, WW |
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Describe inheritance patterns involving multiple alleles. |
Complex patterns of inheritance have more than two phenotypes. Includes incomplete dominance, codominance, multiple alleles, sex-linked traits, and polygenic traits. |
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Describe polygenic inheritance and give examples. |
The occurrence of one or more extra sets of chromosomes in triploid organisms (3n), wheat (6n), sugar cane (8n), and oats. (6n). |
Common in plants. |
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Describe sex-linked traits and how they are inherited. |
They are traits controlled by genes located on the X chromosomes. Inherited by X/linked traits. More common in males. |
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How can you recognize sex-linked traits in a pedigree? |
Females are the carriers. Mainly affects the male sec. The traits can skip generations. |
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Give a human example of codominance. |
Sickle-cell anemia. |
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Give a human example of multiple alleles. |
Blood types (A, B, O) |
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Give a human example of sex-linked traits. |
Red-green colour blindness. |
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Give a human example of polygenic inheritance. |
Skin cancer. |
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What is the 23rd pair of chromosomes called? |
Sex chromosomes. |
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Define the following: Homozygous recessive Homozygous dominant Heterozygous Carrier |
Homozygous recessive: has two recessive alleles (rr) Homozygous Dominant: has two dominant alleles (RR) Heterozygous: has one dominant and one recessive allele (Rr) Carrier: what carries a trait (X^H X^h) |
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