Circle correct answer Humans can cannot tolerate trisomics for every chromosome

Circle correct answer humans can cannot tolerate

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cannot What conclusion can you make about the unbalance of chromosomes in humans. Circle correct answer. Humans ( can cannot ) tolerate trisomics for every chromosome, only a few and the resulting phenotype is usually (normal abnormal ). 10 a) If a father and son both have defective (red green) color vision, is it likely that the son inherited the trait from his father? No, the gene for red-green color blindness is found on the X chromosome and sons receive their X chromosome from their mother. b) A normal woman, whose father had hemophilia A, marries a normal man. What is the chance that their first child will have hemophilia A. Two answers are acceptable. 1)The normal woman would be heterozygous for hemophilia A, because she must receive the hemophilia A gene from her father. All of the daughters from this marriage would be normal and one half of her sons will have hemophilia. 2) The probability that the first child will have hemophilia would be ½ chance of a son X ½ chance of getting the hemophilia allele = 1/4 11) Consider the X and Y chromosomes in a spermatocyte. a) Show the sex chromosomes that would be found in 4 gametes by normal disjunction at both Meiosis I & II X X Y Y b) Show the 4 gametes that would be produced by non-disjunction in Meiosis I. XY XY O O c) Show the 4 gametes that would be produced by non-disjunction of Y at Meiosis II. X X YY O d) Show the 4 gametes that would be produced by non-disjunction of X at Meiosis II. XX O Y Y 12. What does the Barr body represent? The Barr body represents an inactivated X chromosome . 13. How many Barr bodies would be present in a cell I each of the following human conditions? a) Kleinfelter syndrome (XXY) b) Turner syndrome c) XXX d) XYY e) Down syndrome a) one b) 0 c) 2 d) 0 e) 1 if a female and 0 if a male
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14. The following question involves a dihybrid meiocyte, Aa Bb, with 2n=4. Chromosome 1 is a
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  • Spring '11
  • dr
  • Gamete, Zb Zw

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