Lethal genes are those which
cause the death of the organism in which they are present
cause the death of the homozygous infant being formed
cause the death of heterozygous infant being formed
all of the above
- A giant chromosome having many chromo-nemata lying side by side all along their length is called
- Linkage is
- Reverse transcription was discovered by
- The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
- A codon is a sequence of 3 nucleolides on
- The best method to determine whether an individual is homozygous or heterozygous is
- The genetic constitution of an organism is known as
- In a monohybrid cross the Fi ratio of a backcross is
- DNA duplication occurs in
- Dyad is
- The chromosomal theroy of heredity implies that
- When two genes are situated very close to each other in a chromosome
- Linked genes may be separated by the process of
- A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
- Crossing over in meiosis occurs in
- The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
- Chromosomes exhibit minimum coiling during
- The scientists who rediscovered the Mendel's laws are
- When is the sex of an offspring decided
- Exhibition of superiority by a hybrid over both of its parents is called
- The number of characters investigated by Mendel was
- Which one of the following chemical characteristics is not common to all living beings ?
- Diakinesis is characterised by
- A colour-blind man marries the daughter of a colour-blind person. In their progeny
- The nuclear membrane completely disappears during
- A child is bom with an extra chromosome in each of its cells. This is usually the result of
- Which disease results from the genetic inability to synthesize a single enzyme ?
- Down's syndrome is an example of
- A chemical mutagen is
- Among the following which is a test cross?