Which disease results from the genetic inability to synthesize a single enzyme ?
Diabetes
Phenylketonuria
Colour-blindness
Down's syndrome
- If an individual does not breed true for its characters, it is called
- A codon is a sequence of 3 nucleolides on
- Crossing over in meiosis occurs in
- A chemical mutagen is
- In humans, an example of sex-linked trait is
- In the Operon concept, the regulator gene regulates chemical reactions in the cell by
- Lethal genes are those which
- Base substitutions from base analogues I are called
- Mutations which are not dominant are not lost by a gene pooL This is known as
- The term 'meiosis' was coined bv
- A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
- The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
- DNA duplication occurs in
- The condition in which only one allele of a pair is present is known as
- In a monohybrid cross the Fi ratio of a backcross is
- Down's syndrome is an example of
- The scientists who rediscovered the Mendel's laws are
- An offspring of two homozygous parents different from one another by alleles at only one gene locus…
- Linked genes may be separated by the process of
- Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
- A giant chromosome having many chromo-nemata lying side by side all along their length is called
- A colour-blind man marries the daughter of a colour-blind person. In their progeny
- Dyad 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…
- Exhibition of superiority by a hybrid over both of its parents is called
- The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
- How many meiosis will be required to produce 102 pollen-grains ?
- A child is bom with an extra chromosome in each of its cells. This is usually the result of
- Transfer of a gene or genes through a virus is called