Question
Which of the following best describes the partial expression of two alleles A. codominance B. incomplete dominance C. complete dominance D. epistasis Which of the following best describes a gene that has more than one effect? A. epistasis B. pleiotropy C recessive D. dominant Which of the following best describes an allele that is expressed in heterozygous or homozygous condition? A. epistasis B. pleiotropy C recessive D. dominant The gene interaction demonstrated by maize leaf development, in which the F_2 phenotypic ratio from an F_1 dihybrid cross is 15: 1 is known as A. complementary gene interaction B. recessive epistasis C. dominant epistasis I D. redundancy In complementary gene action, dominant alleles of two or more genes are required to generate a particular trait A. True B. False If a phenotype is controlled by the genotypes at two different lo the interaction of these genes is called A. epistasis B. epigenetics C. dominance D. codominance E. incomplete dominance Which of the following best describes the equal expression of two alleles A. codominance B. incomplete dominance C. complete dominance D. epistasis Which of the following best describes allele that is expressed only in the homozygous condition? A. dominant B. recessive C. codominance D. incomplete dominance A person who has type A blood has A. anti-A antibodies B. anti-B antibodies C. anti-AB antibodies D. both anti-A and anti-B antibodies E. no surface antigens Which of the following best describes what is occurring in blood type AB? A. codominance B. incomplete dominance C. complete dominance D. epistasis A wild-type allele is always designated by A. a superscript minus sign B. a superscript plus sign C. a capital letter D. a smaller case letter A father who is I^AI^AHh and a mother who is high have a child. What are the possible phenotypes of that child A. blood types A and B B. blood types A and O C. blood types AB and O D. None of the above
Explanation / Answer
1) A codominanace. both alleles are simultaneously expressed partially in the heterozygote.
2)B Pleiotropy. It occurs when one gene influences two or more seemingly unrelated phenotypic traits. Therefore, a mutation in a pleiotropic gene may have an effect on several traits simultaneously due to the gene coding for a product used by a myriad of cells or different targets that have the same signaling function
3) Ddominant. dominant alleles are expressed both in heterozygous as well as honozygous conditions.
5) True. Dominant alleles of two or more genes give the complementary gene action which is an action distinct from the action of the individual alleles.
