Dr. Smith's parents have normal hearing. However, Dr. Smith has an inherited form of deafness. Deafness is a recessive trait tha
t is associated with the abnormal allele d. The normal allele at this locus, associated with normal hearing, is D. Dr. Smith's parents could have which of the following genotypes? a. DD and dd
b. dd and dd
c. DD and DD
d. Dd and DD
The options are incomplete and have been listed incorrectly. Complete question has been attached.
Answer:
C) Dd and Dd
Explanation:
It is given that deafness is a recessive trait which means that Dr. Smith has genotype dd since a recessive trait can only be expressed when both the alleles in genotype are recessive. However, his parents are normal. So his parents can have DD or Dd genotype. Dr. Smith has obtained one recessive d allele from his father and other recessive d allele from his mother. Thus, the parents should have Dd genotype and the correct option is c.
It is a Vacuole based on the choices. More correctly though it would be called a vesicle since that is what is created by endocytosis like what is shown.
Once the visual cortex has established the position of the
can, the motor cortex sends a signal <span>through</span>
the peripheral nervous<span> </span><span>system</span> using the efferent <span>neurons</span> to the muscles of the forearm and
fingers. This allows the muscles to contract and relax so that the arm moves to
the can and the fingers able to grip the can.
Cell theory meets the definition of scentific theory because cell theory is historic scientific theory and it should be a law because it is universally accepted.