In chickens, rose comb (R) is dominant over single comb (r). When a heterozygous rose-combed rooster is mated with a single-combed hen, what is the expected phenotypic ratio of the offspring? a. 75% rose-combed and 25% single-combed

b. 100% single-combed

c. 50% rose-combed and 50% single-combed

d. 100% rose-combed

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.

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.

Are fatty streaks formed by multiple foam cells?