DNA duplication occurs in
meiosis only
meiosis II and mitosis
mitosis only
meiosis I and mitosis
- The first person to induce mutations was
- Which one of the following chemical characteristics is not common to all living beings ?
- The condition in which only one allele of a pair is present is known as
- A giant chromosome having many chromo-nemata lying side by side all along their length is called
- Mutations which are not dominant are not lost by a gene pooL This is known as
- A child is bom with an extra chromosome in each of its cells. This is usually the result of
- Reverse transcription was discovered by
- How many meiosis will be required to produce 102 pollen-grains ?
- In the Operon concept, the regulator gene regulates chemical reactions in the cell by
- If an individual does not breed true for its characters, it is called
- The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
- Lethal genes are those which
- A codon is a sequence of 3 nucleolides on
- Klinefelter's syndrome is developed when the chromosome in male is
- A colour-blind man marries the daughter of a colour-blind person. In their progeny
- In a monohybrid cross the Fi ratio of a backcross is
- Exhibition of superiority by a hybrid over both of its parents is called
- The nuclear membrane completely disappears during
- When two genes are situated very close to each other in a chromosome
- The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
- Dyad is
- Crossing over in meiosis occurs in
- Albinism in com plants is best described as
- A chemical mutagen is
- DNA duplication occurs in
- The segment of DNA which participates in crossing over is known as
- A functional unit of a gene which specifies synthesis of one poly-peptide is known as
- An offspring of two homozygous parents different from one another by alleles at only one gene locus…
- The genetic constitution of an organism is known as
- The science dealing with study of inheritance and variation is