A recessive gene allele a. can only be expressed when paired ...

[casperchen82]

A recessive gene allele
 
  a. can only be expressed when paired with a matching allele.
 b. can influence a genotype, but not a phenotype.
 c. can influence the phenotype of female children, but not male children.
 d. can influence a phenotype when it occurs in pairs or on the X chromosome.

Question 2

Mutations
 
  a. always have negative outcomes.
 b. always have positive outcomes.
 c. can have positive, negative, or neutral outcomes.
 d. have neither positive nor negative outcomes, because they are always recessive.

[Pamela.irrgang@yahoo.com]

Answer to Question 1

d

Answer to Question 2

c

[casperchen82]

YES! Correct, THANKS for helping me on my review

[amcvicar]

Gracias!