Question
What is the structural and functional unit of heredity?
Gene
Chromosome
DNA
RNA
Gene
Chromosome
DNA
RNA
Hint:
This information is present inside the nucleus.
The correct answer is: Gene
- Genes are the basic physical and functional units of heredity. Genes are made of DNA. Some genes act as instructions for making molecules called proteins.
- However, many genes do not code for proteins. Everyone has two copies of each gene, that one inherits from each parent.
- Most genes are the same in all people, but a small number (less than 1% of all) differ slightly from person to person.
- Alleles are forms of the same gene with slight differences in the sequence of DNA bases. These small differences contribute to each person's unique physical characteristics.
Related Questions to study
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
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
