In a monohybrid cross the Fi ratio of a backcross is
1:1
3:1
1:2:1
9:3:3:3
- The number of characters investigated by Mendel was
- Base substitutions from base analogues I are called
- Dyad is
- Klinefelter's syndrome is developed when the chromosome in male is
- In a monohybrid cross the Fi ratio of a backcross is
- A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
- Mutations which are not dominant are not lost by a gene pooL This is known as
- If an individual does not breed true for its characters, it is called
- A functional unit of a gene which specifies synthesis of one poly-peptide is known as
- A giant chromosome having many chromo-nemata lying side by side all along their length is called
- How many meiosis will be required to produce 102 pollen-grains ?
- An offspring of two homozygous parents different from one another by alleles at only one gene locus…
- The nuclear membrane completely disappears during
- The chromosomal theroy of heredity implies that
- The best method to determine whether an individual is homozygous or heterozygous is
- A chemical mutagen is
- In the Operon concept, the regulator gene regulates chemical reactions in the cell by
- When is the sex of an offspring decided
- Linkage is
- Chromosomes exhibit minimum coiling during
- A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
- Which disease results from the genetic inability to synthesize a single enzyme ?
- Diakinesis is characterised by
- The term 'meiosis' was coined bv
- A colour-blind man marries the daughter of a colour-blind person. In their progeny
- Transfer of a gene or genes through a virus is called
- The science dealing with study of inheritance and variation is
- When two genes are situated very close to each other in a chromosome
- Colour blindness is caused due to
- Exhibition of superiority by a hybrid over both of its parents is called