1. A population is at genetic equilibrium if
Select one:
a. there is no change in population numbers over time
b. small populations migrate slowly
c. there is no change in allele frequencies over time
d. superior breeding mates are selected
2. A farmer planted some bean seeds. When the seeds germinated, 209 of the seedlings were albino, a recessive trait, and 2691 were green. Determine the proportion of the seedlings that you would expect to be homozygous for the production of chlorophyll. Express your answer as a decimal.
3. A farmer planted some bean seeds. When the seeds germinated, 2691 of the seedlings were albino, a recessive trait, and 211 were green. Determine the number of seedlings that you would expect to be carriers of the albino allele.
4. Use picture attachment for this question
Diploma exams in Biology 30 commonly have used three kinds of numerical response genetic questions: dihybrid crosses, blood typing, and the pedigree analysis style. You have gained background in these by studying Mendelian genetics previously.
In this unit, another type of genetic question is considered: a combination of Hardy Weinberg Principle and Pedigree Analysis. How can you tell the difference between the two broad types of genetic questions? In this situation, you must identify the number of individuals from a Pedigree Chart. Too many situations occur where individuals are just not known. The Hardy Weinberg Principle must be used to identify the number. Consider the following question.
Numerical Response:
If the individuals in this pedigree represented a distinct population, how many of the 21 people could be expected to be heterozygous for PKU? 1 mark
Note: PKU is an autosomal recessive genetic disorder.
5. Population geneticists determine the gene frequencies of grizzly bear populations in an effort to
Select one:
a. control the characteristics of future bear populations to prevent extinction
b. eliminate undesirable characteristics
c. understand how traits are distributed
d. understand how to reduce bear encounters in the back country
6. If a geneticists finds 25% of a population to be phenotypic recessive for a trait, he can predict reasonably that
Select one:
a. 100% of the population carry the recessive allele
b. 75% are heterozygous
c. 75% are homozygous for the dominant trait
d. 50% are heterozygous
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