Question

Osteogenesis imperfecta is a disease caused by non-functional A. Dominant; chloride ion channel B. Dominant; collagen C. Dominant; hemoglobin D. Recessive; chloride ion channel E. Recessive; collagen AB. Recessive; hemoglobin 14. Sickle cell disease is an example of many distinct traits (and therefore causes many symptoms). A. codominance B. pleiotropy C. incomplete dominance D. multiple allelic trait E. x-linked inheritance because it is caused by one abnormal gene that affects 15. In a Punnett square: A. the results show the offspring's expected genotypes. B. all different kinds of sperm are lined up either horizontally or vertically C. all different kinds of eggs are lined up either horizontally or vertically. D. All of the choices are correct while women with X-linked 16. Men with X-linked disorders always pass the genes for the disorder to disorders always pass the genes for the disorder to and which chromosome each parent passes on to their children, and draw a Punnett square to help you figure it out!) A. only their daughters; both their daughters and sons B. only their daughters; only their daughters C. both their daughters and sons; both their daughters and sons D. both their daughters and sons; only their daughters E. both their daughters and sons; only their sons (Hint: think about the genotype of each parent 17. Polygenic inheritance occurs when A. multiple genes affect one trait. B. one gene affects multiple traits. C. there are multiple alleles for a single gene. D. there is only one allele for a gene. 18. Which enzyme separates the parent strands of DNA during DNA replication? A. DNA polymerase B. RNA polymerase C. Aminoacyl-1RNA synthetase D. Helicase E. DNA ligase AB. Restriction enzyme 19. Which of the following statements about DNA replication is FALSE? A. Complementary base pairs are held together with hydrogen bonds. B. The enzyme that makes the new DNA molecule is DNA polymerase. C. Unwinding' or 'unzipping' of the DNA molecule occurs as hydrogen bonds break D. The process is known as semiconservative replication because one old strand is conserved new molecule. E. None of the above.

Answer 1

13. It is a autosomal dominant inherited from parents or occur through mutations and this is caused by non functional of collagen.(B) is the correct.

14.sickle cell is pleiotropic disease because the expression of single mutated HBB genes produces numerous consequences through out the body.(B)is the correct.

15.punnet squares explain no. Of expected genotype.in this arrangement of sperms are lined in vertically and all types of eggs arranged in horizontal. Correct answer is(A) is correct.

16.x linked disorders are mainly transferred the characters to their daughters than their sons because they x and y chromosome in which x chromosome received to their daughter. Women with 2 x chromosome are given equal share to both of children.(a) is the correct.

17.polygenic inheritance means one gene affect multiple traits it is similar to pleiotropy .(b ) is the correct.

18.Helicase separate the two strands of DNA.(d).is the correct.

19.none of the above.