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- Explain the relationship between a mutation, a protein, a trait, as well as dominance and recessivity of an allele. You may use the example of the taster gene that you examined in your practical if you wish.Population genetics is the study of ________. a. how allele frequencies in a population change over time b. populations of cells in an individual c. the rate of population growth d. how genes affect embryological developmentYou perform an adoption study and you determine that for the trait observed there is a strong genetic effect. This is because you observed _______. A. similarities between the adoptees and their sibblings B. similarities between adoptees and adoptive parents C. similarites between adoptees, biological parents, and adoptive parents D. similarities between adoptees and biological parents
- Which term indicates that a single gene has two or more alleles present in a population? A. Point mutation B. Genotype C. Polymorphism D. PleiotropyThe term polymorphism can refer to both genes and traits. Explain what is meant by a polymorphic gene and a polymorphic trait. If a gene is polymorphic, does the trait that the gene affects also have to be polymorphic? Explain why or why not.Rate of evolution by selection is highest for an allele when it is _________ . a. wild type b. recessive c. dominant d. co-dominant
- Imagine you are studying tail length in giant lobsters. You discover that one genetic locus influences tail length. The alleles at the locus are T and t. A lobster with a tt genotype has a tail length of 2 feet. A lobster with a genotype of Tt has a tail length of 3 feet. And a lobster with a TT genotype has a tail length of 4 feet. Based on this information the genetic variation at this locus is best described as what? a. Additive genetic variation b. Dominant genetic variation c. Environmental genetic variation d. Fixed genetic variationYou are examining a population of snakes in which 20% of the individuals exhibit the recessive phenotype for albinism. If albinism is exhibited only by the genotype aa, how many snakes out of a population of 100 would you expect to CARRY the albinism allele (so be Aa), but be normal color?If a dominant trait shows a penetrance of 50%, then ___. A. All affected individuals in the population are heterozygotes. B. Individuals who have the gene show an intermediate trait. C. Half the individuals in the population have the gene. D. Half the individuals in the population who have the gene show the trait.
- What is example of artificial selection, explain traits that were selectedWhen Gregor Mendel first proposed his theories on genetics, they were not recognized. This was because: A. Charles Darwin didn't agree with Gregor Mendel's theories. B. The current theory was that traits from parents blended together in their offspring. C. Gregor Mendel proposed that individuals could change their physical traits during their lifetime and pass those new traits on to their offspring. D. Scientists believed there were 5 nucleotide bases, not 4 nucleotide bases.Biologists classify specific forms of traits as good or bad. For example, long tails in cats could be classified as good and short tails as bad. true or false?