Question

8. the SRY region determines maleness in mammals. in other words. if present, a male will develop following the events of fertilization. therefor, which of the following could also develop into a male?

a. Down syndrome, 46,xx

b. a person with one normal and one shortened (deleted) X

c. translocation of SRY to an autosome of a 46, XX, individual

d. Turner syndrome, 45,x

e. a person with an extra X chromosome

9. What is the pH of a solution with a hydroxyl ion (oh-) concentration 10^-12 M.

a. ph 4

b. ph 14

c. ph 12

d. ph 2

e. ph 10

10. in a species of porcupine, having short quills is an autosomal recessive trait; in other words, to have short quills, both alleles must be recessive, and it is not inherited on a sex-chromosome. normal quill length in porcupines is long. if two long quilled porcupines have 3 offspring only one of which has shorter quills, what must be the genotypes of the parents

a. both parents must be heterozygous

b. one parent homo for recessivee allele, the other parent can be homo dominant, homo recessive, or heterozygous

c. both parents must be homo dominant

d. one parent homo Dom, other parent heterozygous

e. one parent heterozygous, other parent homo Dom, homo recessive, or heterozygous

Answer 1

Felt great to answer. Good luck!