In a monohybrid cross the Fi ratio of a backcross is
1:1
3:1
1:2:1
9:3:3:3
- A colour-blind man marries the daughter of a colour-blind person. In their progeny
- The genetic constitution of an organism is known as
- A codon is a sequence of 3 nucleolides on
- The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
- The science dealing with study of inheritance and variation is
- Mutations which are not dominant are not lost by a gene pooL This is known as
- Albinism in com plants is best described as
- Lethal genes are those which
- Linkage is
- A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
- Which one of the following chemical characteristics is not common to all living beings ?
- Colour blindness is caused due to
- A chemical mutagen is
- In a monohybrid cross the Fi ratio of a backcross is
- Dyad is
- In the Operon concept, the regulator gene regulates chemical reactions in the cell by
- A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
- In humans, an example of sex-linked trait is
- The segment of DNA which participates in crossing over is known as
- Klinefelter's syndrome is developed when the chromosome in male is
- The nuclear membrane completely disappears during
- Linked genes may be separated by the process of
- Down's syndrome is an example of
- Among the following which is a test cross?
- If an individual does not breed true for its characters, it is called
- Which disease results from the genetic inability to synthesize a single enzyme ?
- A functional unit of a gene which specifies synthesis of one poly-peptide is known as
- Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
- A child is bom with an extra chromosome in each of its cells. This is usually the result of
- The best method to determine whether an individual is homozygous or heterozygous is