An example of a trait that results from a single dominant allele is _____. A.attached earlobes B.cystic fibrosis C.more frequent in its appearance   D.polydactyly

This chart shows different patterns of inheritance in four pedigrees. Assume that individuals marrying into the family are homozygous for the wild-type allele. Which pedigree shows an autosomal dominant pattern of inheritance? a. III b. IV c. II d. I

Brandy has naturally blond hair. Based on this information, what do we know about Brandy’s parents? a. At least one of her parents has a recessive blond hair gene. b. Each of her parents must have one recessive blond hair gene. c. Each of her parents must have one dominant brown hair gene. d. Neither of her parents has a recessive blond hair gene.

A condition in which both alleles of a heterozygous condition are expressed as a blending of traits is ______. a incomplete dominance b sex-linked c transformation d crossing over