Advertisements
Advertisements
प्रश्न
How can test cross decipher the heterozygosity of a plant?
उत्तर
This cross determines whether the dominant character is coming from homozygous dominant genotype or heterozygous genotype (e.g. tallness coming from TT or Tt). When TT is crossed with tt, we obtain all Tt (tall) individuals in the progeny, whereas when Tt is crossed with tt, we obtain Tt (tall) and tt (dwarf) individuals in the progeny. Thus, a test cross can be used to determine the heterozygosity of the plant.
APPEARS IN
संबंधित प्रश्न
Two independent monohybrid crosses were carried out involving a tall pea plant with a dwarf pea plant. In the first cross, the offspring population has equal number of tall and dwarf plants, whereas in the second cross it was different. Work out the crosses and explain giving reasons for the difference in the offspring population.
State a difference between a gene and an allele.
Work out a cross up to F1 generation only, between a mother with blood group A (Homozygous) and the father with blood group B (Homozygous). Explain the pattern of inheritance exhibited.
If the mother is a carrier of colour blindness and the father is normal, the possible genotype and
the phenotype of the offspring of the next generation, with the help of a punnet square
Choose the correct options of the following question:
In the given pedigree chart, the trait shown is:
Give a scientific term for the following:
An alternative form of the single gene which influences the same character and produces different expressions in different individuals a species.
Given below is the representation of a relevant part of the amino acid composition of the β-chain of hemoglobin, related to the shape of human red blood cells.
(a) Is this representation of the sequence of amino acids indicating a normal human or a sufferer from certain blood related genetic diseases? Give reasons in support of your answer.
(b) Why is the disease referred to as a Mendelian disorder? Explain.
When a single gene influences more than one traits it is called ______.
In Antirrhinum, RR is phenotypically red flowers, rr is white and Rr is pink. Select the correct phenotypic ratio in F1 generation when a cross is performed between RR X Rr: ______
What does low hematocrit value represent?
