7 Which of the following genetic relatives share an X chromo

7) Which of the following genetic relatives share an X chromosome with an XY male? (fo each indicate same, different, or can\'t tell) a) His genetic mother b) His genetic father c) His genetic son d) His genetic daughter e) His genetic full sister His genetic half sister (same genetic mother) g) His genetic half sister (same genetic father) h) His genetic full brother His genetic half brother (same genetic mother) j) His genetic half brother (same genetic father)

Solution

A male inherits his maternal X-chromosome and paternal Y-chromosome.

a) His genetic mother- same

b) His genetic father- different

c) His genetic son- different

d) His genetic daughter- same

e) His genetic full sister- same

f) His genetic half-sister (same genetic mother)- can’t tell

g) His genetic half-sister (same genetic father)- different

h) His genetic full brother- can’t tell

i) His genetic half-brother (same genetic mother)- can’t tell

j) His genetic half-brother (same genetic father)- different

9)

An individual with two X-chromosomes is a female. Further SRY gene is sex-determining region Y, this is a testis determining factor. When the gene translocates to autosome, primary and secondary sexual characters are influenced. Autosomes are non-sex chromosomes, and so a non-functional SRY gene results in development of ovaries and suppression of male characters.