Question 7
Homologous pairs of chromosomes often _____________.

A. are not both present in dipoid somatic cells
B. contain different alleles
C. carry different genes for different traits
D. differ in length
E. are paired up in the G2 phase of the cell cycle

Question 8
A woman with type O blood is expecting a child. Her husband is type A. Both the woman's father and her husband's father had type B. What is the probability that the child will have type O blood?

A. 50%
B. 25%
C. 0%
D. 75%
E. 100%

Questi

Question

Question 7 
     Homologous pairs of chromosomes often _____________.

   A.    are not both present in dipoid somatic cells
   B.    contain different alleles
   C.    carry different genes for different traits
   D.    differ in length
   E.    are paired up in the G2 phase of the cell cycle

Question 8  
     A woman with type O blood is expecting a child. Her husband is type A. Both the woman's father and her husband's father had type B. What is the probability that the child will have type O blood?

   A.    50%
   B.    25%
   C.    0%
   D.    75%
   E.    100%

Questi

anonymous · Answer

Q7 confused me. It should either be A or be E because the other three go against their name (homologous)! I think it is E because there is nothing wrong with somatic cells having homologous chromosomes. 

For Q8 -- Woman has 00 alleles, and Husband has AO alleles (regardless of their fathers alleles). Thus, there is a 50% chance of the child having the OO alleles.

anonymous · Answer

|dw:1337012914754:dw|

^ Here is a genetic diagram explaining Q8.