Answer questions 9-10 in reference to the pedigree in Figure H-1, which shows th

Question

Answer questions 9-10 in reference to the pedigree in Figure H-1, which shows the inheritance of PTC tasting (inheritedthrough a dominant allele (T) Figure H-1. PTC Family Tree 9. (comprehension) What is the genotype of person #22 b. Tt ?.tt d. T? e. can't determine genotype from information given 10, (application) lfperson #7 got married and their first child was a PTC taster, what are the possible genotype(s) of her husband? both a and b are possible genotypes for the husband both a and c are possible genotypes for the husband d. b. c. Tt e. (application) If your mother is homozygous normal, but your father has Huntington's disease (inherited through a dominant allele) even though his father was completely normal, what is the probability you will escape the disease entirely (be homozygous normal)? 11. 25% 50% 75% d. e. 100% no chance at all of escaping the disease a. b, 12. (recall) In a normal human being, there are: 46 chromosomes 23 pairs of chromosomes one pair of sex chromosomes a. b. d. all of the choices (a-c) are correct e. both a and c above are correct, but b is incorrect

Explanation / Answer

9) The genotype of person 2 should be d. T?. It can be homozygous for dominant allele (TT) or heterozygous (Tt) for dominant allele. Presence of one dominant allele is sufficient to express the PTC tasting.

10) both a and b can be the possible genotypes for the husband. The genotypes TT or Tt will be the genotype of the husband. This is because the wife is normal and for their child to be PTC taster, the father of the child should carry the dominant allele. So the husband should be either TT or Tt

12) In a normal human being, there are 46 chromosomes, one pair of sex chromosomes and 22 pairs of autosomes.

23 pair of chromosomes = 46 chromosomes

So all choices are correct.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---