Biology

Cell Cycle and Chromosomes

1,348 Questions

Explore a curated list of questions covering the cell cycle, mitosis, and meiosis. Topics include DNA replication, chromosomal structures, and genetic disorders. This material is essential for students preparing for biology and general science competitive exams.

Cell cycle eventsDNA replicationMeiosis processChromosomal structuresGenetic disorders

Cell Cycle and Chromosomes Questions

Multiple choice

What is the term used to describe the process by which genetic material is exchanged between homologous chromosomes during meiosis?

  1. Genetic recombination

  2. Gene flow

  3. Mutation

  4. Genetic drift
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Genetic recombination involves the exchange of genetic material between homologous chromosomes during meiosis, resulting in the creation of new gene combinations.

Multiple choice

Which of the following is an example of a chromosomal disorder?

  1. Down syndrome

  2. Cystic fibrosis

  3. Sickle cell anemia

  4. Tay-Sachs disease
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Down syndrome is an example of a chromosomal disorder, caused by an extra copy of chromosome 21.

Multiple choice

What is the most common type of chromosomal disorder?

  1. Down syndrome

  2. Trisomy 18

  3. Trisomy 13

  4. Turner syndrome
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Down syndrome is the most common type of chromosomal disorder.

Multiple choice

Which of the following is a common type of chromosomal rearrangement observed in cancer cells?

  1. Translocation

  2. Inversion

  3. Deletion

  4. Duplication
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Translocation, the exchange of genetic material between two chromosomes, is a common chromosomal rearrangement in cancer cells.

Multiple choice

What is the name of the process by which cells divide and produce two identical daughter cells?

  1. Mitosis

  2. Meiosis

  3. Binary fission

  4. Budding
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mitosis is the process by which cells divide and produce two identical daughter cells. This process is essential for growth, development, and repair of tissues.

Multiple choice

What is the name of the process by which cells divide and produce four daughter cells, each with half the number of chromosomes as the parent cell?

  1. Mitosis

  2. Meiosis

  3. Binary fission

  4. Budding
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Meiosis is the process by which cells divide and produce four daughter cells, each with half the number of chromosomes as the parent cell. This process is essential for sexual reproduction.

Multiple choice

Which of the following is a type of cell division that occurs during early embryonic development?

  1. Mitosis

  2. Meiosis

  3. Cytokinesis

  4. Gastrulation
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Cleavage is a type of cell division that occurs during early embryonic development, resulting in the formation of smaller cells called blastomeres.

Multiple choice

What is a cytogenetic map?

  1. A map that shows the relative positions of genes on a chromosome

  2. A map that shows the actual sequence of nucleotides in a chromosome

  3. A map that shows the inheritance of genetic traits

  4. A map that shows the genes responsible for genetic diseases
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A cytogenetic map is a map that shows the relative positions of genes on a chromosome. It is based on the study of chromosomes using cytogenetic techniques, such as karyotyping and FISH (fluorescence in situ hybridization).

Multiple choice

What is a YAC (yeast artificial chromosome) map?

  1. A map that shows the relative positions of genes on a chromosome

  2. A map that shows the actual sequence of nucleotides in a chromosome

  3. A map that shows the inheritance of genetic traits

  4. A map that shows the genes responsible for genetic diseases
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A YAC (yeast artificial chromosome) map is a map that shows the relative positions of genes on a chromosome. It is based on the study of YACs, which are large DNA molecules that can be cloned and propagated in yeast. The YACs are then analyzed to determine which genes are located on each YAC.

Multiple choice

What is the fundamental unit of heredity?

  1. Gene

  2. Chromosome

  3. DNA

  4. Protein
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A gene is the fundamental unit of heredity and is a region of DNA that codes for a specific protein.

Multiple choice

Which term describes the physical location of a gene on a chromosome?

  1. Genotype

  2. Phenotype

  3. Allele

  4. Locus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Locus refers to the specific location of a gene on a chromosome.

Multiple choice

What is the term used to describe the process by which a cell divides into two identical daughter cells?

  1. Mitosis

  2. Meiosis

  3. Binary fission

  4. Budding
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mitosis is the process by which a cell divides into two identical daughter cells. This process is essential for the growth and development of organisms.

Multiple choice

Which of the following is not a phase of mitosis?

  1. Prophase

  2. Metaphase

  3. Anaphase

  4. Telophase
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Prophase, metaphase, and anaphase are all phases of mitosis. Telophase is a phase of meiosis, not mitosis.

Multiple choice

What is the term used to describe the process by which a cell divides into four haploid daughter cells?

  1. Mitosis

  2. Meiosis

  3. Binary fission

  4. Budding
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Meiosis is the process by which a cell divides into four haploid daughter cells. This process is essential for sexual reproduction.

Multiple choice

Which of the following is not a phase of meiosis?

  1. Prophase I

  2. Metaphase I

  3. Anaphase I

  4. Telophase I
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Prophase I, metaphase I, and anaphase I are all phases of meiosis. Telophase I is a phase of mitosis, not meiosis.