Hemophilia is a serious bleeding disorder caused by a sex-linked recessive allele. What are the chances of a normal male and a female who is a carrier for hemophilia having a child with hemophilia? 0%
1/4 or 25%
1/2 or 50%
3/4 or 75%

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

What is the difference between sex-linked traits and autosomal traits in humans? a. sex-linked traits can only be passed from fathers to sons, while autosomal traits can be passed on from both parents to offspring of any sex. b. sex-linked traits are passed on through the x and y chromosomes, while autosomal traits are passed on through the other 22 chromosomes. c. sex-linked traits only affect females, while autosomal traits affect both males and females. d. sex-linked traits refer to genes that are on the x and y chromosomes, while autosomal traits refer to genes on all 23 chromosomes.

Which is not a type of symmetry? a. asymmetryb. radial symmetryc. bilateral symmetryd. lateral symmetry