Module 38 Classical Genetics Unit Quiz - Classical Genetics...

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Classical Genetics Unit QuizAttempt 1 of 2Started: 02/10/2016 6:09 PM ESTSubmitted: 02/10/2016 6:33 PM ESTScore: 80%Points: 120 out of 150Question 1Points:10 out of 10A haploid organism has how many copies of each chromosome?1234FeedbackCorrect. A haploid organism has one of each chromosome.
Question 2Points:10 out of 10Which of these discusses genotypes rather than phenotypes.
Question 3Points:0 out of 10Somatic mosquito cells have 6 chromosomes. How many chromosomes dogametes have?
1224FeedbackIncorrect. Somatic cells are diploid. Gametes are haploid and would have halfthe number of chromosomes.Question 4Points:10 out of 10In humans, the condition for normal blood clotting (H) is dominant tohemophilia (h). A male who has normal blood clotting mates with a womanwho is a carrier. If they have a son, what is the probability that he will havethis condition?
Correct. The XHY x XHXh results in 50% of sons that are XHY (and do nothave the condition) and 50% that are XhY (and do have the condition).Question 5Points:10 out of 10Alleles are different versions of aGeneGenotypePhenotypeChromosomeFeedbackCorrect. Different versions of genes are called alleles.
Question 6Points:10 out of 10Huntington’s disease is an autosomal dominant disorder. A person with thedisorder and a person without the disorder mate. Both of these individualsare homozygous. What is the chance that the offspring will developHuntington’s?
75%50%25%FeedbackCorrect. If the parents are AA x aa, all of the offspring will be Aa. SinceHuntington’s is dominant, heterozygous individuals will develop thecondition.Question 7Points:0 out of 10This trait is _______________.
autosomal dominantautosomal recessiveSex-linked dominantFeedbackIncorrect. The couple on the left have the trait and have children without thetrait. Therefore they must be heterozygous (and showing the dominantphenotype), while the children are homozygous recessive (and showing therecessive phenotype).

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Term
Spring
Professor
N/A
Tags
Biology, Genetics, Zygosity, Sex linkage

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