Inheritance
1.
A. The most likely mode of inheritance is autosomal recessive because the parents are carriers and have passed it onto their children. Also because the second generation of children were not affected, but the 3rd generation was. This shows that it is recessive and not dominant.
B. The father is either AA or Aa(carrier) and the mother is AA or Aa. If the father AA this means the mother has to be Aa, also if the mother AA then the dad has to be AA, also the parents could be carriers as well(Aa).
C. 0% of the children will have genotype AA, 50% of the children will have genotype Aa, and 50% of the children will have genotype aa.
D.100% of their children will have AA, 0% of their children will have Aa, and 0% of their children will have aa.
E. 0% of their children will be AA, 100% of their children will be Aa, and 0% of their children will be aa.
2.The most likely mode of inheritance for this disease is autosomal dominant because affected fathers cannot produce affected daughters and all the sons of affected mothers have to be affected as well. The pedigree disapproves this, and this makes it autosomal dominant instead of sex linked trait plus, there is an affected child in every generation which makes it dominant.
3.
A. It causes the Tay-Sachs Disease.
B. It is found on the HEXA gene. Chromosome number 15.
C. The genotype for the carrier is CC . And the genotype for an individual who physically expresses the disease is CG.
4.
A. It is associated with heart disease. The chromosome number is 9.
B. CC indicates that your risk for heart disease increased 1.9 times. And CG means 1.5 times increase.
5.
A. The Tay Sachs disease is more impacted by genetics because it is found on the HEXA gene and heart disease is more impacted by the environment because different environmental issues.
B. Someone might have a gene that could give them a disease if they don't eat healthy. So...