Question 1

Which prenatal testing method involves removing cells from the chorion, and at what stage of pregnancy is it typically performed?

Accepted Answer

Chorionic villus sampling (CVS), performed at 8 weeks

Question 2

A couple is unable to conceive due to blocked fallopian tubes. Which assisted reproductive technology is most appropriate for them?

Accepted Answer

In vitro fertilization (IVF)

Question 3

Which of the following statements about cytoplasmic inheritance in humans is correct?

Accepted Answer

Only the egg contributes mitochondrial DNA to the zygote

Question 4

A plant leaf shows patches of white and green. Which genetic mechanism best explains this variegation?

Accepted Answer

Random assortment of chloroplasts with defective and normal DNA during cell division

Question 5

Which equation best represents the probability of inheriting a mitochondrial disorder from a mother with defective mitochondrial DNA?

Accepted Answer

$$P = 1$$

Question 6

Which of the following is a disadvantage of artificial insemination (AI) in wildlife conservation?

Accepted Answer

It may decrease efforts to preserve species in the wild

Question 7

A karyotype analysis reveals an extra chromosome 21. What is the diagnosis?

Accepted Answer

Down syndrome

Question 8

Which of the following best describes horizontal gene transfer?

Accepted Answer

Transfer of genetic information from one species to a different species

Question 9

Which organelle is responsible for cytoplasmic inheritance of energy metabolism disorders in humans?

Accepted Answer

Mitochondrion

Question 10

Which equation represents the random assortment of chloroplasts during cell division?

Accepted Answer

$$P_{green} = \frac{n_{green}}{n_{total}}$$

Question 11

Which prenatal test is most likely to detect chromosomal abnormalities earlier in pregnancy?

Accepted Answer

Chorionic villus sampling (CVS)

Question 12

Which of the following is a real-world application of DNA egg swapping?

Accepted Answer

Preventing inheritance of mitochondrial diseases

Question 13

Which equation best represents the probability of a daughter cell receiving only defective chloroplasts during cell division?

Accepted Answer

$$P = \frac{n_{defective}}{n_{total}}$$

Question 14

Which of the following symptoms is NOT typically associated with mitochondrial genetic disorders?

Accepted Answer

Skin cancer

Question 15

Which process is illustrated by the green sea slug Elysia chlorotica acquiring photosynthetic ability?

Accepted Answer

Horizontal gene transfer

Question 16

Which equation would you use to calculate the probability of a child inheriting a nuclear genetic disorder from heterozygous parents?

Accepted Answer

$$P = 0.25$$

Question 17

Which of the following is a key advantage of artificial insemination (AI) in animal breeding?

Accepted Answer

Semen can be frozen and stored for long periods

Question 18

Which statement best describes the origin of mitochondria and chloroplasts in eukaryotic cells?

Accepted Answer

They originated as independent prokaryotes before becoming organelles

Question 19

Which equation would you use to calculate the probability of a child inheriting a mitochondrial disorder if the mother is affected?

Accepted Answer

$$P = 1$$

Question 20

Which of the following is a controversial implication of assisted reproductive technologies (ARTs)?

Accepted Answer

Intervening in natural reproductive processes

Fertilization, Cytoplasmic Inheritance, and Prenatal Genetic Testing

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