hemophilia is a sex linked trait carried on the x chromosome in an example of a male with hemophilia and a female carrier what percentage of the offsp
Logo

Nursing Elites

HESI A2

HESI A2 Biology 2024

1. In an example of a male with hemophilia and a female carrier, what percentage of the offspring is predicted to be carriers only?

Correct answer: C

Rationale: In this scenario, the male offspring will inherit the X chromosome with the hemophilia gene from the mother, as males have one X chromosome inherited from their mother. The female offspring will inherit one normal X chromosome from the father and one X chromosome with the hemophilia gene from the mother, making them carriers of the hemophilia trait. Therefore, 50% of the offspring will be carriers only. Option A (0%) is incorrect as female offspring will inherit the X chromosome with the hemophilia gene from the mother. Option B (25%) is incorrect as the female offspring will not be unaffected. Option D (100%) is incorrect as not all offspring will be carriers, only the female offspring.

2. Which organelle is responsible for detoxifying harmful substances in the cell?

Correct answer: C

Rationale: The correct answer is C, Peroxisomes. Peroxisomes are responsible for detoxifying harmful substances in the cell by breaking down fatty acids and producing hydrogen peroxide. This process helps protect the cell from damage caused by toxic substances. Choice A, Endoplasmic Reticulum, is involved in protein and lipid synthesis, not detoxification. Choice B, Lysosomes, contain enzymes for digestion and waste removal, not primarily detoxification. Choice D, Golgi Apparatus, is responsible for modifying, sorting, and packaging proteins for secretion, not detoxification.

3. Why is it important for cells to undergo mitosis?

Correct answer: D

Rationale: It is important for cells to undergo mitosis because it produces cells for the growth and repair of body tissues. Mitosis allows for the formation of genetically identical daughter cells, ensuring proper function and maintenance of the organism's body. By producing new cells, mitosis helps in the replenishment of damaged or worn-out tissue and supports overall growth and development. Choices A, B, and C are incorrect because mitosis is not directly related to reproduction with male and female gametes, increasing variation within the species, or producing cells different from the parent cell. These functions are more associated with meiosis, which is specifically for sexual reproduction and genetic diversity.

4. Which cellular structure is found in animal cells but not in plant cells?

Correct answer: A

Rationale: The correct answer is A, Centriole. Centrioles are found in animal cells but not in plant cells. They play a crucial role in organizing microtubules during cell division, aiding in the formation of the mitotic spindle. Plant cells lack centrioles; instead, they utilize microtubule organizing centers to perform similar functions during cell division. Choices B, C, and D are incorrect because cytoplasm is a part of both animal and plant cells, vacuoles are found in plant cells and some animal cells, and the Golgi apparatus is present in both types of cells.

5. What provides the cell with the ability to move and propel?

Correct answer: B

Rationale: Microtubules are the cellular structures responsible for cell movement and propulsion. Microtubules are part of the cytoskeleton and play a crucial role in various cellular processes, including cell motility and intracellular transport. While microfilaments also contribute to cell movement by enabling muscle contraction and cell shape changes, they are not primarily responsible for propelling the cell. Flagella and cilia are cellular appendages involved in cell movement, but they are composed of microtubules, making them the structures that move due to the actions of microtubules.

Similar Questions

Which is true of gametes?
Which of the following is the best example of a hypothesis?
Enzymes can _ reactions.
Which, if any, of the following statements about the biosphere is correct?
Which is not a step in the water cycle?

Access More Features

HESI A2 Basic
$49/ 30 days

  • 3,000 Questions with answers
  • 30 days access

HESI A2 Premium
$99/ 90 days

  • Actual HESI A2 Questions
  • 3,000 questions with answers
  • 90 days access

Other Courses