<em>The answer is endoplasmic reticulum</em>
Answer:
the first answer that is there a cell with half the chromosome number of the parent cell
Since the trait is dominant, it is possible for his parents to be heterozygous (Bb). So they have the trait but they have a gene they can pass on with out it. If both of his parents Bb then he could’ve gotten both recessive and therefore not receive the trait
