Answer:
The condition in which an organism whose cells have either gained or lost a chromosome is called an <u>aneuploidy</u>.
Yes, an amniocentesis is necessary.
While both the woman and the husband may not exhibit sickle cell anemia, they could be carriers of the sickle cell recessive gene. If she is heterozygous for sickle cell allele, because of her father, and the man has no recessive gene, then the child has no chance of exhibiting the disease but has a 0.5 chance of being a carrier.
However, if the man is also a carrier, the child has a 0.25 probability of having sickle cell anemia.
Answer:Silent mutations arise while the alternate of a single DNA nucleotide inside a protein-coding part of a gene does now no longer have an effect on the series of amino acids that make up the gene's protein.
Explanation: