171. In populations with a high rate of intermarriage between related individual

Question

171. In populations with a high rate of intermarriage between related individuals, such as the Ashkenazi Jewish population, the occurrence of carrier heterozygotes and individuais affected by autosomal recessive traits is compared to the general population. A)the same B) significantly lowerC)significantly higherD)ememely rare 172. If genes, not environment, are a major contributor to a particular human trait, one should observe which of the following from twin studies? Aj some degree of concordance between ditygotic twins and a lower concordance between monorygotic twins B) some degree of concordance between monorygotic twins and a lower concordance between irvgotic twins C) a similarly low concordance between both monorygotic and dizygotic twins D) a similarly high concordance between both monotyeotic and diveotic twins E) none of the above 173. Both amniocentesis and chorionic villus sampiling ICVSI yieild samples that can be used for can be performed earlier and yieid resuilts quicker A) biochemical analysis; amniocentesis B) Isolation of DNA for screening for particular gene mutations CVS C) analysis of chromosomes for abnormal chromosomal numbers or structures cvs D] biochemical analysis, isolation of ONA for screening for particular gene mutations and analysis of for abnormal chromosomal or structures E) biochemical analysis, isolation of DNA for screening for perticular gene mutations, and analysis of chromosomes for abnormal chromosomal numbers or structures, cvs 174. Which of the following is the mest kely mode of inheritance for the pedigree shown above A) autosomal recessive 8) autosomal dominant CXinked recessive D)K-linked dominant E)Y-inked 26

Explanation / Answer

Q171:- option C (Significantly higher)

Explanation:- Since their population is small and they are practicing inbreeding or consanguinity. Thus the lod of harmful recessive deleterious allels will be high.

Q172:- Option D (None of the above)

Explanation:- If only genes contribute towards the trait of individuals and influence of environmental is neglected then there should be higher degree of concordance between monozygotic twins and no concordance between diazygotic twins. This is because monozygotic twins are formed of single egg and sperm (when zygote undergoes cleavage the diploid zygote separates into two embryos each developing into independent embryo) and are of same sex same genetic composition thus are genetically alike.whereas the diazygotic twins are formed of two eggs and different sperms hence genetically different.

Q173:- Option C

Explanation:- used for analysis of chromosomes for abnormal chromosomal numbers or structures and CVS is used earlier and yeild results quicker.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.