Question 1 Question 6 Which of the following does NOT make it difficult to study

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Question 1 Question 6 Which of the following does NOT make it difficult to study human genetic traits? o a. long generation time Which of the following is/are advantage(s) of chorionic villus sampling (CVS) compared with amneocentesis? a. CVS is done earlier inpregnancy b. small family size C. controlled matings are not possible O b. CVS takes less time to get the results, after the sample has been taken C. a smaller sample is taken with CVS than with amneocentesis o d. none of the above they all make it difficult to study human genetic traits o d. a and b e aand b and c 1 pointsSave Answer Question 2 1 pointsSave Answer In pedigree analysis, which of the following is NOT true? Question a. a diagonal line through a circle or square indicates a deceased individual b. a square with a dot in the middle represents a carrier male, who carries a disease allele but does not show the trait Ultrasonography can be used to detect neural-tube defects in the developing fetus True C. individuals in a pedigree who marry into the family are not given an identifying number (such as lIlI-2) o d. a double line between two individuals in a pedigree indicates a mating between two closely related individuals 1 points Saved Question 8 1 points Save Answer Question 3 Pre-implantation genetic diagnosis is carried out on embryos produced by in vitro fertilization, and involves removal and analysis of a single cell from the developing embryo In pedigree analysis, a feature of autosomal recessive traits is that the parents of an affected individual are usualy unaffected. In addition, autosomal recessive traits usually appear with equal frequency in males and females O True True False False 9 1 points Saved Question 1 points Save Answer Epilepsy shows 59% concordance in monozygotic twins and 19% concordance in dizygotic twins. This suggests that genes do not influence epilepsy Question 4 True False X-linked recessive traits appear more frequently in females than males, and can be recognized in pedigrees because of this True 1 points Saved Question 1 pointsSave Answer Adoption studies have shown that genetic-factors influence body-mass index Question 5 True With an X-linked mutation, affected fathers are unable to pass the mutation to their sons. This is true whether the mutation is dominant or recessive. O False True False

Explanation / Answer

1. Option-D - All make it difficult to study

2. Option A - A diagonal line through a square or circle does not indicate diseased individual

3. True

4. False - They are seen in males since they have only one copy of X chromosome

5. True.

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