Question

10. In the following questions, identify the type of inheritance. Some questions may have multiple terms that apply.

Terms:

Simple Dominance, Codominance, Incomplete dominance, Multiple Alleles, Pleiotropy, Epistasis, Norm of Reaction (environmental effect) , Polygenic, Continuous variation, Linkage, Epigenetics-X inactivation, Epigenetics-Genomic Imprinting, Extranuclear inheritance

6) An individual is heterozygous for blood type. This person’s red blood cells produce both the A antigen and the B antigen.

7) Human height is influenced by many genes and by the environment and nutrition that an individual experiences.

8) Flower color in a newly discovered plant is controlled by one gene. There are three different variant forms of the gene in the plant population.

9) The Law of Independent assortment predicts an equal amount of parental (nonrecombinant) and recombinant type offspring when the double heterozygote is crossed with the double recessive, but when the offspring are counted, there is a much greater amount of parental nonrecombinant offspring. The relatively small number of recombinants is a result of crossover.  

10)Offspring are heterozygous for a dominant trait but only express their father’s recessive allele. The maternal gene is “written on” to turn off expression for the life of the individual.  

11)Two genes interact with each other to influence coat color. The first gene controls the ability to make coat pigment (A). The recessive allele blocks pigment production. If pigment can be made, the second gene codes for either brown color (B) or white (b).  

12)A mother passes her trait to all of her children but only her daughters can pass it to their children. The genes are unchanged generation after generation unless mutation occurs.  

Answer 1

6.Codominance-. An individual is heterozygous for blood type. This person’s red blood cells produce both the A antigen and the B antigen.

7. Polygenic inheritance- Human height is influenced by many genes and by the environment and nutrition that an individual experiences.

8. Pleiotropy- Flower color in a newly discovered plant is controlled by one gene. There are three different variant forms of the gene in the plant population.

9. Linkage-  The Law of Independent assortment predicts an equal amount of parental (nonrecombinant) and recombinant type offspring when the double heterozygote is crossed with the double recessive, but when the offspring are counted, there is a much greater amount of parental nonrecombinant offspring. The relatively small number of recombinants is a result of crossover.  

10. Epigenetics-X inactivation

11. Epistasis-

12. Extranuclear inheritance- A mother passes her trait to all of her children but only her daughters can pass it to their children. The genes are unchanged generation after generation unless a mutation occurs.