It contains DNA from more than one species. All of the answer choices are correct. What has to occur for a person to inherit an autosomal recessive trait? Both parents must contribute recessive alleles. One parent must contribute a recessive allele. One parent must contribute a recessive allele while the other contributes a dominant allele.
It is a genetic copy of a cell. A father is colorblind. What are the odds that he passes this gene to his son? Bert has blonde hair (b). Molly has brown hair (B), but her genotype is Bb, meaning she carries a recessive blonde allele.