1. Polygenic inheritance
2. Pleiotropy
3. Total penetrance
4. Additive expressivity
Polygenic inheritance
1. Zero
2. 1/4
3. 5/8
4. 9/64
Zero
1. 1/64
2. ¼
3. 5/8
4. 9/64
1/64
1. A completely gene elsewhere
2. A small effect on one trait
3. Reversible effects on the phenotype,depending on age
4. Many effects on the phenotype
Many effects on the phenotype
1. Syndromes
2. Reversible by diet therapy
3. Reversible by gene therapy
4. Extremely rare
Syndromes
1. 1568
2. 1773
3. 1866
4. 1921
1866
1. Female plants
2. Male plants
3. Typical plants in each generation
4. Weak plants
Typical plants in each generation
1. Hybrid
2. Mutant
3. The P generation
4. The F2 generation
Hybrid
1. One
2. Two
3. Four
4. Eight
One
1. Recessive to the allele for green colour
2. Dominant over the allele for green colour
3. Epistatic over other alleles
4. Expressed only in gametes
Dominant over the allele for green colour