BIO 260- Modifications to Mendel
1. through random mutation
- They are "selected" through natural selection
- i.e., by pressures from the environment: How do alleles arise?
2. false: True or false, Mendel's 4 postulates ALWAYS apply
3. - Incomplete Dominance
- Codominance
- Multiple Alleles
- Lethal Alleles: Different ways a character (ex. coat color) can be affected by several factors at a single gene.
4. - Epistasis
- Pleiotropy: Different ways a character (ex. coat color) can be affected by multiple, interacting genes
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, 5. Single Locus Factors: Incomplete and Co-Dominance
6. Incomplete Dominance: neither of the 2 alleles are dominant over the other
-a blending of alleles
7. Co-Dominance: A condition in which both alleles for a gene are fully expressed
-Code for the allele is a superscript (A1(white); A2(blue))
8. Co-Dominance in AB blood type: Blood Types A and B refer to the type of terminal sugar on the
membrane protein.
-O means terminal sugar is absent
-Blood type alleles often symbolized by letter i.
9. Multiple Alleles: three or more forms of a gene that code for a single trait
ex. in blood cells, result in A,B,O blood types (IA, IB, i; 3 alleles)
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1. through random mutation
- They are "selected" through natural selection
- i.e., by pressures from the environment: How do alleles arise?
2. false: True or false, Mendel's 4 postulates ALWAYS apply
3. - Incomplete Dominance
- Codominance
- Multiple Alleles
- Lethal Alleles: Different ways a character (ex. coat color) can be affected by several factors at a single gene.
4. - Epistasis
- Pleiotropy: Different ways a character (ex. coat color) can be affected by multiple, interacting genes
1/2
, 5. Single Locus Factors: Incomplete and Co-Dominance
6. Incomplete Dominance: neither of the 2 alleles are dominant over the other
-a blending of alleles
7. Co-Dominance: A condition in which both alleles for a gene are fully expressed
-Code for the allele is a superscript (A1(white); A2(blue))
8. Co-Dominance in AB blood type: Blood Types A and B refer to the type of terminal sugar on the
membrane protein.
-O means terminal sugar is absent
-Blood type alleles often symbolized by letter i.
9. Multiple Alleles: three or more forms of a gene that code for a single trait
ex. in blood cells, result in A,B,O blood types (IA, IB, i; 3 alleles)
2/2
