Question
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
Produce genetically identical gametes
Increase genetic diversity
To prevent mutations
Keep the redundancy of the cell high
Hint:
Crossing over alters the genes which is the reason why we don't look exactly the same as our parents.
The correct answer is: Increase genetic diversity
- Crossover is the process that takes place between homologous chromosomes to increase genetic diversity.
- In a crossover, part of one chromosome is exchanged for another. The result is a hybrid chromosome with a unique pattern of genetic material.
- Gametes acquire the ability to be genetically distinct from neighboring gametes after crossover occurs. This allows for genetic diversity that helps cells participate in the survival of the fittest and evolution.
Related Questions to study
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
What is the structural and functional unit of heredity?
Gene
Chromosome
DNA
RNA
What is the structural and functional unit of heredity?
Gene
Chromosome
DNA
RNA
When does crossing over occur in meiosis?
Metaphase I
Prophase I
Anaphase II
Prophase II
When does crossing over occur in meiosis?
Metaphase I
Prophase I
Anaphase II
Prophase II
__________is the degree to which differences are seen in parents and their off springs.
Heredity
Inheritance
Variation
Recombination
__________is the degree to which differences are seen in parents and their off springs.
Heredity
Inheritance
Variation
Recombination
DNA is present in _________ of a cell.
Nucleus
Cytoplasm
Mitochondria
ER
DNA is present in _________ of a cell.
Nucleus
Cytoplasm
Mitochondria
ER
The following image shows the mechanism of _______ mutation.
Point mutation.
Inversion mutation.
Deletion mutation.
None of the above.
The following image shows the mechanism of _______ mutation.
Point mutation.
Inversion mutation.
Deletion mutation.
None of the above.
_____________ mutation causes sickle cell anemia.
Frameshift mutation.
Point mutation.
Translocation mutation.
None of the above.
_____________ mutation causes sickle cell anemia.
Frameshift mutation.
Point mutation.
Translocation mutation.
None of the above.
The picture shows which type of chromosomal mutation?
Deletion mutation.
Inversion mutation.
Translocation mutation.
Duplication mutation.
The picture shows which type of chromosomal mutation?
Deletion mutation.
Inversion mutation.
Translocation mutation.
Duplication mutation.
Down’s syndrome is an example of:
Aneuploidy
Deletion mutation
Polyploidy
Point mutation
Down’s syndrome is an example of:
Aneuploidy
Deletion mutation
Polyploidy
Point mutation
______ mutations originate during meiosis while ______ mutation originates during mitosis.
Germinal, somatic
Germinal, spontaneous
Spontaneous, point
Somatic, germinal
______ mutations originate during meiosis while ______ mutation originates during mitosis.
Germinal, somatic
Germinal, spontaneous
Spontaneous, point
Somatic, germinal
_____________ is the transfer of characters from parents to offspring.
Variation
Inheritance
Mutation
Crossing over
_____________ is the transfer of characters from parents to offspring.
Variation
Inheritance
Mutation
Crossing over
Mitosis is also known as _________________.
Equational division
Reductional division
Additional division
None of the above
None of the above
Mitosis is also known as _________________.
Equational division
Reductional division
Additional division
None of the above
None of the above
