Answer:
The correct option is D
Explanation:
Beta-thalassemia major is a hereditary disorder that usually causes severe anaemia. This mutation/disorder eventually leads to death if untreated especially during in the first two years of infancy. The treatment usually involves the transfusion of blood to clear the phenotypic blockage caused by the mutation. However, it requires both alleles to have the thalessemia mutation for a patient to be said to have beta-thalassemia major. Hence, <u>it is </u><u>not true</u><u> that it involves just the x allele and thus affects males more often than females</u>.
Answer:
It is a learned behavior.
Explanation:
Typically, tool use implies a complex behavior that requires training and observing someone else who already has that particular ability. Thus, this ability shall be learned by one generation from the previous one, which shows and teaches this behavior to the next one.
Answer:
1. Write out your key in terms of what is dominant and what is recessive.
2. Determine the genotypes of each parent and write the cross.
3. Figure out what kind of gametes each parent may produce.
4. Set up a Punnett square for your making.
Explanation:
A dihybrid cross must be a 4 x 4 square which two variables for each square.