homozygote

"He is an unusual individual."

"The human body cell is a diploid, containing two sets of chromosomes. "

"This beer has no equal."

"My sister brought several books to the library, and that one is about dinosaurs. "

"I went to the park because the weather was nice. "

"My brother and I have different alleles for the gene that controls eye color. "

"From Earth, we could observe maria, the dark, ancient lava plains on the Moon, with just a pair of binoculars. "

"Many students invite their parents to school events. "

"Because eye color is determined by genes, a person might have alleles for brown eyes and alleles for blue eyes. "

"In genetics, a recessive can only express its trait if two copies of it are present. "

"My brother has a genetic predisposition to being a good athlete. "

"I could no more climb that than fly!"