Question
Meiosis is characterized by
Reduction division
Equal division
Both reduction and equal division
Paining of non-homologous chromosomes
Reduction division
Equal division
Both reduction and equal division
Paining of non-homologous chromosomes
Hint:
If there are 24 chromosomes in the parent cell the daughter cells will have 12 chromosomes.
The correct answer is: Reduction division
- Meiosis is sometimes called "because it reduces the number of chromosomes to half the normal number. So when the sperm and egg fuse, the baby will have the correct number.
- Therefore, the purpose of meiosis is to produce gametes, sperm, and eggs with half the genetic complement of the parent cell. For example, a diploid somatic cell contains 2n = 4 chromosomes, 2 from the mother and 2 from the father. In humans, 2n = 46 and n = 23.
Related Questions to study
Which of the following does not result in variations among siblings?
Independent assortment of genes
Crossing over
Linkage
Mutation
Which of the following does not result in variations among siblings?
Independent assortment of genes
Crossing over
Linkage
Mutation
A diploid cell with a diploid number of 24 chromosomes undergoes meiosis. How many chromosomes are present in each daughter cell after division?
36
24
48
12
A diploid cell with a diploid number of 24 chromosomes undergoes meiosis. How many chromosomes are present in each daughter cell after division?
36
24
48
12
What type of cell division occurs in cells of testes and ovaries?
Mitosis
Interphase
Meiosis
None of the above
What type of cell division occurs in cells of testes and ovaries?
Mitosis
Interphase
Meiosis
None of the above
Meiosis results in _____
2 haploid daughter cells
4 haploid daughter cells
2 diploid daughter cells
4 diploid daughter cells
Meiosis results in _____
2 haploid daughter cells
4 haploid daughter cells
2 diploid daughter cells
4 diploid daughter cells
Meiosis I is reductional division, and meiosis II is equational division because of
Separation of chromatids
The disjunction of homologous chromosomes
Crossing over
The pairing of homologous chromosomes
Meiosis I is reductional division, and meiosis II is equational division because of
Separation of chromatids
The disjunction of homologous chromosomes
Crossing over
The pairing of homologous chromosomes
Meiotic division takes place in
Conductive cells
Vegetative cells
Reproductive cells
Meristematic cells
Meiotic division takes place in
Conductive cells
Vegetative cells
Reproductive cells
Meristematic cells
What is the importance of crossover?
New genetic combinations
For meiosis to occur
To clone a chromosomal segment
Mutation
What is the importance of crossover?
New genetic combinations
For meiosis to occur
To clone a chromosomal segment
Mutation
Which of the following structures are formed by two homologous chromosomes pair during crossing over?
Base Pair
Chromatid
Tetrad
None of these
Which of the following structures are formed by two homologous chromosomes pair during crossing over?
Base Pair
Chromatid
Tetrad
None of these
In prophase I of meiosis I __________ occurs.
Non-disjunction
Separation of homologous chromosomes
Separation of sister chromatids
Crossing over
In prophase I of meiosis I __________ occurs.
Non-disjunction
Separation of homologous chromosomes
Separation of sister chromatids
Crossing over
What structures exchange genetic material during crossing over?
Non-sister chromatids
Non-homologous chromosomes
Sister chromatids
Egg and the sperm
What structures exchange genetic material during crossing over?
Non-sister chromatids
Non-homologous chromosomes
Sister chromatids
Egg and the sperm
What is the evolutionary purpose of cells that undergo crossing over?
Produce genetically identical gametes
Increase genetic diversity
To prevent mutations
Keep the redundancy of the cell high
What is the evolutionary purpose of cells that undergo crossing over?
Produce genetically identical gametes
Increase genetic diversity
To prevent mutations
Keep the redundancy of the cell high
When does chromosomal crossover occur?
Interphase
Meiosis II
Mitosis
Meiosis I
When does chromosomal crossover occur?
Interphase
Meiosis II
Mitosis
Meiosis I
Chromosomal crossover is the natural pairing up and exchanging of genetic material between
Any chromosomes
Homologous chromosomes
Non-homologous chromosomes
Extra-nuclear chromosomes
Chromosomal crossover is the natural pairing up and exchanging of genetic material between
Any chromosomes
Homologous chromosomes
Non-homologous chromosomes
Extra-nuclear chromosomes
Which of the following does not cause variation?
New gene combinations by meiosis
Errors occurring during replication
Mitosis
Mutations caused by environmental factors
Which of the following does not cause variation?
New gene combinations by meiosis
Errors occurring during replication
Mitosis
Mutations caused by environmental factors
