#1
Which type of cell division produces gametes?
Meiosis
ExplanationMeiosis is the cell division process that produces gametes (sperm and egg cells) with half the chromosome number of the parent cell.
#2
What is the role of the spindle fibers during cell division?
Separating chromatids in mitosis
ExplanationSpindle fibers play a crucial role in mitosis by separating chromatids and ensuring each daughter cell receives a complete set of chromosomes.
#3
Which type of cell division is responsible for tissue growth and repair?
Mitosis
ExplanationMitosis is the type of cell division responsible for tissue growth, repair, and maintenance, producing genetically identical daughter cells.
#4
What is the term for the process by which a single diploid cell becomes four haploid cells?
Meiosis
ExplanationMeiosis is the process by which a single diploid cell undergoes two rounds of division, resulting in the formation of four haploid cells.
#5
During spermatogenesis, how many functional sperm cells are typically produced from one primary spermatocyte?
4
ExplanationSpermatogenesis results in the production of four functional sperm cells from a single primary spermatocyte, ensuring the formation of mature sperm.
#6
What is the main purpose of mitosis?
To generate identical daughter cells
ExplanationMitosis is the cell division process responsible for generating two identical daughter cells, maintaining chromosome number and genetic makeup.
#7
During which phase of the cell cycle does DNA replication occur?
S phase
ExplanationDNA replication occurs during the S phase of the cell cycle, ensuring each daughter cell receives a complete set of genetic material.
#8
In meiosis, how many rounds of cell division occur to produce four daughter cells?
Two
ExplanationMeiosis involves two rounds of cell division, resulting in the formation of four haploid daughter cells with unique genetic combinations.
#9
Which of the following is a reproductive structure found in flowering plants?
Stamen
ExplanationThe stamen is a male reproductive structure in flowering plants, producing pollen containing male gametes.
#10
During which phase of the menstrual cycle does ovulation occur?
Follicular phase
ExplanationOvulation occurs during the follicular phase of the menstrual cycle when a mature follicle releases an egg from the ovary for potential fertilization.
#11
What is the term for the fusion of gametes to form a zygote?
Fertilization
ExplanationFertilization is the process of fusion between gametes (sperm and egg) to form a zygote, initiating the development of a new organism.
#12
Which of the following is a characteristic of asexual reproduction?
Production of offspring without gametes
ExplanationAsexual reproduction involves the production of offspring without the involvement of gametes, resulting in genetically identical individuals.
#13
What is the significance of crossing over in meiosis?
Creates genetic variation
ExplanationCrossing over in meiosis involves the exchange of genetic material between homologous chromosomes, leading to increased genetic diversity among offspring.
#14
Which phase of the cell cycle is characterized by cell growth and normal metabolic activities?
G1 phase
ExplanationThe G1 phase of the cell cycle is focused on cell growth and normal metabolic activities before entering the DNA synthesis phase.
#15
What is the term for the failure of chromosomes to separate correctly during cell division?
Nondisjunction
ExplanationNondisjunction is the failure of chromosomes to separate properly during cell division, leading to abnormal chromosome numbers in daughter cells.