Class 26 - Chromosomal structure and abnormality Study...

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Unformatted text preview: Chromosomal structure and abnormality Study published Jan 8, 2008 Current Biology Journal You study eye formation using Mexican cave-dwelling blind fish. You know that blindness is a trait controlled by multiple genes and inherited in a recessive manner. A blind fish from a true-breeding line in one cave was crossed to a blind fish from a true-breeding line in another cave. If the mutation that cause blindness is in different genes in two fish, you should see: A. None of the offspring are blind B. 25% of the offspring are blind C. 50% of the offspring are blind D. 75% of the offspring are blind E. All of the offspring are blind Study published Jan 8, 2008 Current Biology Journal You study eye formation using Mexican cave-dwelling blind fish. You know that blindness is a trait controlled by multiple genes and inherited in a recessive manner. A blind fish from a true-breeding line in one cave was crossed to a blind fish from a true-breeding line in another cave. If the mutation that cause blindness is in different genes in two fish, you should see: A. None of the offspring are blind B. 25% of the offspring are blind C. 50% of the offspring are blind D. 75% of the offspring are blind E. All of the offspring are blind aaBB x AAbb AaBb Blind Blind Can See Please answer this question without talking to your neighbor UNC has hired you to generate gold bear mascots. You mutate a bunch of bears and get 4 that are gold because of recessive mutations. You carry out crosses between all the bears (all bears can mate with each other, dont worry about mascot sex) and produce the following results where a "-" means mutant gold bears were produced and a "+" means wild-type brown bears were produced. 1 2 3 4 1- + ? 2 +- 3 + 4 Which statement is correct? A. 1 crossed with 4 will produce a gold bear B. 1 crossed with 4 will produce a brown bear C. You need more information to answer this question http://en.wikipedia.org/wiki/ Image:University_of_Northern_Colorado.svg Now talk to your neighbor and answer again UNC has hired you to generate gold bear mascots. You mutate a bunch of bears and get 4 that are gold because of recessive mutations. You carry out crosses between all the bears (all bears can mate with each other, dont worry about mascot sex) and produce the following results where a "-" means mutant gold...
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Class 26 - Chromosomal structure and abnormality Study...

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