Farmer jones has a herd of cows. brown coat is dominant over white coat in cows and his cows are all brown. farmer jones likes brown cows and wants to keep his herd brown by selling off any heterozygous cows. heterozygous cows are brown but have the recessive gene for white coat. suppose farmer jones wants to do a test cross of his cows to see what type of genotypes are carried for coat color throughout his herd. what is the genotype of the control bulls he should use to test for the heterozygous genotype?

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.

digestion

it excretes wastes