Dyad is
a pair of homologous chromosomes
a pair of non-homologous chromosomes
a pair of sister chromosomes
a pair of non-sister chromosomes
- An offspring of two homozygous parents different from one another by alleles at only one gene locus…
- Which disease results from the genetic inability to synthesize a single enzyme ?
- A codon is a sequence of 3 nucleolides on
- If an individual does not breed true for its characters, it is called
- A giant chromosome having many chromo-nemata lying side by side all along their length is called
- The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
- A functional unit of a gene which specifies synthesis of one poly-peptide is known as
- Which one of the following chemical characteristics is not common to all living beings ?
- Down's syndrome is an example of
- A chemical mutagen is
- Klinefelter's syndrome is developed when the chromosome in male is
- When two genes are situated very close to each other in a chromosome
- How many meiosis will be required to produce 102 pollen-grains ?
- Colour blindness is caused due to
- Linked genes may be separated by the process of
- The best method to determine whether an individual is homozygous or heterozygous is
- Lethal genes are those which
- Albinism in com plants is best described as
- The term 'meiosis' was coined bv
- A child is bom with an extra chromosome in each of its cells. This is usually the result of
- When is the sex of an offspring decided
- Base substitutions from base analogues I are called
- The nuclear membrane completely disappears during
- In the Operon concept, the regulator gene regulates chemical reactions in the cell by
- In humans, an example of sex-linked trait is
- Linkage is
- Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
- In a monohybrid cross the Fi ratio of a backcross is
- Crossing over in meiosis occurs in
- A person meets with an accident and great loss of blood has occurred. There is no time to analyse…