science
Grade-10
Easy
Question
When does chromosomal crossover occur?
Interphase
Meiosis II
Mitosis
Meiosis I
Interphase
Meiosis II
Mitosis
Meiosis I
Hint:
In this type of cell division, the number of cells is doubled but the chromosomes remain the same.
The correct answer is: Meiosis I
- Chromosome crossover is one of the final steps of genetic recombination that occurs during the pachytene stage of prophase I of meiosis during a process called a synapse.
- Synapses begin before the synaptonemal complex develops and are not completed until late in prophase I.
- Crossovers usually occur when the matched region on the matched chromosome breaks and then rejoins the other chromosome.
Related Questions to study
science
Chromosomal crossover is the natural pairing up and exchanging of genetic material between
Chromosomal crossover is the natural pairing up and exchanging of genetic material between
scienceGrade-10
science
Which of the following does not cause variation?
Which of the following does not cause variation?
scienceGrade-10
science
What is the structural and functional unit of heredity?
What is the structural and functional unit of heredity?
scienceGrade-10
science
When does crossing over occur in meiosis?
When does crossing over occur in meiosis?
scienceGrade-10
science
__________is the degree to which differences are seen in parents and their off springs.
__________is the degree to which differences are seen in parents and their off springs.
scienceGrade-10
science
DNA is present in _________ of a cell.
DNA is present in _________ of a cell.
scienceGrade-10
science
In sickle cell anemia amino acid______ is formed as a result of point substitution.
In sickle cell anemia amino acid______ is formed as a result of point substitution.
scienceGrade-10
science
The following image shows the mechanism of _______ mutation.
The following image shows the mechanism of _______ mutation.
scienceGrade-10
science
_____________ mutation causes sickle cell anemia.
_____________ mutation causes sickle cell anemia.
scienceGrade-10
science
The picture shows which type of chromosomal mutation?
The picture shows which type of chromosomal mutation?
scienceGrade-10
science
Down’s syndrome is an example of:
Down’s syndrome is an example of:
scienceGrade-10
science
______ mutations originate during meiosis while ______ mutation originates during mitosis.
______ mutations originate during meiosis while ______ mutation originates during mitosis.
scienceGrade-10
science
_____________ is the transfer of characters from parents to offspring.
_____________ is the transfer of characters from parents to offspring.
scienceGrade-10
science
Mitosis is also known as _________________.
Mitosis is also known as _________________.
scienceGrade-10
science
Genetic variation is not caused by:
Genetic variation is not caused by:
scienceGrade-10
