Muscular dystrophy is a sex-linked recessive disorder that causes the muscles to slowly weaken. Which of the following circumstances would a male child most
likely show the trait coded for by the recessive allele?

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an

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?

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?