1. WHICH OF YOUR genotypes were you able to better determine after consideration

Question

1. WHICH OF YOUR genotypes were you able to better determine after consideration of phenotypes of your parent and siblings?

2. WHY DON’T RECESSIVE traits always eventually disappear from populations?

3. WHAT FRACTION OF recessive alleles are “hidden” in heterozygotes for each of the eight single-gene traits that you studied?

4. HOW MANY GENERATIONS would it take to eliminate at least 95% of the alleles for the recessive gene for the inability to taste PTC is a tyrant eliminated those who could not taste PTC from every generation before they could pass on their recessive alleles?

5. WHY MIGHT YOU expect the locus that governs lactose tolerance/intolerance to not be in Hardy-Weinberg equilibrium?

6. WHAT MAY HAVE led to errors in your determining you total ridge count and how confident are you in the reliability of the heritability for this trait that you calculated?

7. IQ IS ANOTHER characteristic that is apparently heavily influenced by both genes and environment. What other human characteristics are likely to fall into this class?

Explanation / Answer

1. Recessive genotypes

2. Recessive genes will not be expressed in the organism’s development. When the organism mates with other, the recessive gene will have 50% chance of being passed on to the next generation. Recessive genes are hidden from natural selection when paired with a dominant gene. So, it is highly impossible for a recessive gene to disappear from population.

4.

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