Fur color in labrador retrievers is determined by two genes (gene b for coat color and gene e for deposition of pigment). nose, lip and gum color is determined only by gene b. a black female with black nose and lips (she has a brown mother and a yellow father) is mated with a brown (chocolate) male whose mother was yellow. what is the probability that they will have a puppy that is yellow with a brown nose?

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine

Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human x chromosome. the patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. they rarely live past their twenties. how likely is it for a woman to have this condition? a) women can never have this condition.b) one-fourth of the daughters of an affected man would have this condition.c) one-half of the daughters of an affected father and a carrier mother could have this condition.d) only if a woman is xxx could she have this condition.

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.