Biology
Cell Cycle and Chromosomes
1,219 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
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an entire duplicate building
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a building with an extra floor
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a building lacking a floor
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a building with a floor with an extra room
C
Correct answer
Explanation
In this analogy, a chromosome is a floor and a gene is a page. Aneuploidy refers to an abnormal number of chromosomes, which corresponds to having an incorrect number of floors in the building.
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length of the songs on the CD
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sequence of songs on the CD
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volume of music on the CD
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tempo of the music on the CD
B
Correct answer
Explanation
Linkage refers to genes being located close together on the same chromosome. In the analogy, if a chromosome is a CD and genes are songs, linkage is represented by the order or sequence in which those songs appear on the disc.
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Haploid Cell
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Diploid Cell
A
Correct answer
Explanation
Haploid cells contain a single set of chromosomes, which is half the number found in diploid somatic cells.
B
Correct answer
Explanation
Meiosis is the specialized cell division process that produces gametes, or sex cells (sperm and eggs), with half the chromosome count.
A
Correct answer
Explanation
Sex cells are haploid, meaning they contain half the number of chromosomes of the parent body cells. Half of 20 is 10.
A
Correct answer
Explanation
Mitosis is the process of cell division that results in two genetically identical daughter cells, used for growth and repair of body cells.
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Haploid Cell
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Diploid Cell
B
Correct answer
Explanation
Diploid cells contain two complete sets of chromosomes, which is the same number as the parent cell.
B
Correct answer
Explanation
Meiosis involves two rounds of division, resulting in four genetically distinct haploid daughter cells.
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identical to
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similar to, but not identical to
B
Correct answer
Explanation
Due to crossing over and independent assortment during meiosis, the resulting daughter cells are genetically unique and not identical to the parent.
A
Correct answer
Explanation
Mitosis involves a single round of division, resulting in two genetically identical daughter cells.
A
Correct answer
Explanation
Mitosis is the process responsible for producing daughter cells that are clones of the parent cell for growth and tissue repair.
A
Correct answer
Explanation
Humans have 23 pairs of chromosomes, one of which is the sex chromosome pair (XX or XY).
A
Correct answer
Explanation
Humans typically have 46 chromosomes in each somatic cell, which are organized into 23 pairs. One set of 23 comes from each parent.
D
Correct answer
Explanation
In humans, biological sex is typically determined by the sex chromosomes. Females possess two X chromosomes (XX), while males possess one X and one Y chromosome (XY).
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mitosis
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an accident
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a mutation
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replication
C
Correct answer
Explanation
A mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people.