Question
_____________ mutation causes sickle cell anemia.
Frameshift mutation.
Point mutation.
Translocation mutation.
None of the above.
Frameshift mutation.
Point mutation.
Translocation mutation.
None of the above.
Hint:
A group of diseases that cause the deformation or destruction of red blood cells. It is caused by genetic changes that instruct the body to make an iron-rich compound called hemoglobin in red blood cells.
The correct answer is: Point mutation.
- Point mutations are genetic alterations in which a single nucleotide base is altered, inserted, or deleted in a DNA or RNA sequence.
- A single-point mutation occurs in sickle cell anemia. This point mutation occurs in the beta-hemoglobin gene. This converts the GAG codon (6th codon) to his GUG codon, which codes for the amino acid valine instead of glutamic acid.
Related Questions to study
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
Genetic variation is not caused by:
Natural selection
Asexual reproduction
Sexual reproduction
Mutation
Genetic variation is not caused by:
Natural selection
Asexual reproduction
Sexual reproduction
Mutation
Crossing over occurs in which phase?
Prophase II
Prophase I
Metaphase II
Metaphase I
Crossing over occurs in which phase?
Prophase II
Prophase I
Metaphase II
Metaphase I
If a diploid cell with a diploid number of 36 chromosomes undergoes meiosis. How many chromosomes are present in each daughter cell after division?
18
16
24
36
If a diploid cell with a diploid number of 36 chromosomes undergoes meiosis. How many chromosomes are present in each daughter cell after division?
18
16
24
36
What is the significance of crossing over?
Cell division
Mutation
Genetic variation
All of the above
What is the significance of crossing over?
Cell division
Mutation
Genetic variation
All of the above
____________ type of cell division takes place in gametes.
Mitotic cell division
Meiotic cell division
Both A and B
None of the above
____________ type of cell division takes place in gametes.
Mitotic cell division
Meiotic cell division
Both A and B
None of the above
After which phase in the cell cycle and DNA replication, meiosis begins?
Interphase
Cytokinesis
G1phase
G2 phase
After which phase in the cell cycle and DNA replication, meiosis begins?
Interphase
Cytokinesis
G1phase
G2 phase
Sexually reproducing organisms produce gametes by the process of?
Mitosis
Meiosis
Cytokinesis
Cell division
Sexually reproducing organisms produce gametes by the process of?
Mitosis
Meiosis
Cytokinesis
Cell division
Meiosis is characterized by
Reduction division
Equal division
Both reduction and equal division
Paining of non-homologous chromosomes
Meiosis is characterized by
Reduction division
Equal division
Both reduction and equal division
Paining of non-homologous chromosomes
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
Identify the wrong statement about meiosis
Pairing of homologous chromosomes.
Four haploid cells are formed.
Number of chromosomes is reduced to half by the end of meiosis.
2 cycles of DNA replication occur.
Identify the wrong statement about meiosis
Pairing of homologous chromosomes.
Four haploid cells are formed.
Number of chromosomes is reduced to half by the end of meiosis.
2 cycles of DNA replication occur.
