Trisomy-21 results from a mutation to the chromosomes in
a. body cells
b. somatic cells
c. gametes
d. skin cells

6. in domesticated cats, the following are independently assorting: normal ears (t) is dominant to tufted ears (t); curved whiskers (c) is dominant to straight whiskers (c); the presence of six toes (s) is dominant to five toes (s); gene for hair length is an x-linked codominant. the three phenotypes for hair length are long (xhxh), medium (xhxh), and short (xhxh); medium is the heterozygous condition. given two parents: ttccssxhxh x ttccssxhy how many different gametes could be formed in the female cat with respect to these four traits? how many phenotypes are possible in the offspring from this mating?

Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above