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BIOD 210 Module 2 Exam Genetics Complete Questions and Answers 1.Which of the following statements is correct ANS Mendel's label of "unit factors" are what we now refer to as genes.
2.True or False: A dominant gene will always cause the expression of
a dominant phenotype in the case of complete dominance ANS true 3.People with sickle-cell disease can become very sick under what condi- tions ANS high altitude 4.A homozygous long-haired cat is bred with a homozygous short-haired cat. Assuming that the gene for long hair is completely dominant, what are the chances of the F1 offspring being short-haired ANS 0%; All offspring will be heterozygous long-haired 5.A dog breeder is looking to cross a long-haired female dog with a 1 / 2
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short-haired male dog. The gene for hair length has incomplete dominance.By crossing the F1 offspring, what percentage of the F2 generation are predicted to be medium-haired: 50%; A 1:2:1 ratio predicts 50% of the offspring to be heterozygotes, or medium- haired 6.Consider 3 genes that assort independently in squirrels. A gene for brown color is dominant (D), a gene for a bushy tail is dominant (B), and a gene for reflux after eating acorns is recessive (a). Use the product law to predict the likelihood of producing a squirrel (from parents that are heterozygous for each trait individually) that is brown, skinny-tailed, but feels ok after eating lots of acorns ANS (3/4) x (1/4) x (3/4) = 9/64 probability of brown, skinny-tailed, and with no reflux.
7.Two individuals with widow's peaks have a child with a straight hairline.
A.True or False: The gene for a widow's peak is likely dominant?
B.True or False: Assuming no codominance, you can conclude that the
par- ents are heterozygous for a widow's peak.C.If the child with the straight hairline someday marries a person with a straight hairline, can you predict whether their offspring will have a widow's peak ANS A. True
- True
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