Question 1

Which of the following best describes the process of cytokinesis in animal cells?

Accepted Answer

The pinching in of the plasma membrane to separate the two daughter cells.

Question 2

During which phase of mitosis do sister chromatids separate and move toward opposite poles of the cell?

Accepted Answer

Anaphase

Question 3

A human cell with 46 chromosomes undergoes meiosis. How many chromosomes will each resulting gamete contain?

Accepted Answer

$$23$$

Question 4

Which of the following is a real-world example of codominance in humans?

Accepted Answer

ABO blood type, where both A and B alleles are expressed equally.

Question 5

What is the probability that two heterozygous parents for Type A blood (genotype $$I^A i) $$will have a child with Type O blood?

Accepted Answer

$$0.25$$

Question 6

Which of the following best explains Mendel’s Law of Segregation?

Accepted Answer

Alleles for a trait separate during gamete formation so each gamete receives only one allele.

Question 7

A pedigree chart shows a trait that appears in every generation and affects both males and females equally. What is the most likely mode of inheritance?

Accepted Answer

Autosomal dominant

Question 8

Which of the following is a major function of meiosis in sexually reproducing organisms?

Accepted Answer

To reduce the chromosome number by half and introduce genetic variation.

Question 9

A woman who is a carrier for hemophilia (X-linked recessive) and a man with normal blood clotting have a son. What is the probability that their son will have hemophilia?

Accepted Answer

$$0.5$$

Question 10

Which of the following best describes nondisjunction and its consequences in humans?

Accepted Answer

Failure of chromosomes to separate during meiosis, leading to gametes with abnormal chromosome numbers.

Question 11

Which of the following is NOT a checkpoint in the eukaryotic cell cycle?

Accepted Answer

S checkpoint

Question 12

Which of the following is a real-world example of environmental effects on genetic traits?

Accepted Answer

The color of Himalayan rabbit fur changing with temperature.

Question 13

Which of the following best describes a monohybrid cross?

Accepted Answer

A cross between two individuals involving one trait.

Question 14

What is the main difference between mitosis and meiosis?

Accepted Answer

Mitosis produces two identical cells, while meiosis produces four genetically unique cells.

Question 15

Which of the following is an example of incomplete dominance?

Accepted Answer

A red flower crossed with a white flower produces pink offspring.

Question 16

Which of the following is a correct statement about autosomes and sex chromosomes in humans?

Accepted Answer

Humans have 22 pairs of autosomes and 1 pair of sex chromosomes.

Question 17

Which of the following is a likely consequence of a mutation in a tumor suppressor gene?

Accepted Answer

Uncontrolled cell division leading to cancer.

Question 18

Which of the following best describes the function of telomeres?

Accepted Answer

They protect chromosome ends from deterioration and fusion.

Question 19

Which of the following is a real-world example of a trisomy disorder in humans?

Accepted Answer

Down syndrome, caused by an extra copy of chromosome 21.

Question 20

Which of the following best explains why sex-linked traits are more commonly expressed in males than females?

Accepted Answer

Males have only one X chromosome, so recessive alleles on the X are always expressed.

General Biology: Cell Division and Patterns of Inheritance – Comprehensive Review Guide

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