A fertilized egg developing is called an embryo. You can rule out unfertilized because it implies that the egg contains no developing life form. You can also rule out the fertilized egg as it is mentioned in the question previously.
Answer: Nondisjunction means that a pair of homologous chromosomes has failed to separate or segregate at anaphase so that both chromosomes of the pair pass to the same daughter cell. This probably occurs most commonly in meiosis, but it may occur in mitosis to produce a mosaic individual.
Answer:
So this is just a guess but i think its D but like I said its a guess.
Half filled circle represent carrier in female
