Advertisements
Advertisements
प्रश्न
Define the following:
Homozygous
उत्तर १
Homozygous - Diploid condition where both the alleles are identical is called homozygous.
उत्तर २
Homozygous (pure): An individual having identical alleles for a particular character is homozygous for that character. It is pure or true breeding for that trait. e.g. TT, tt.
संबंधित प्रश्न
Appearance of new combinations in F2 generation in a dihybrid cross proves the law of_____________ .
- dominance
- segregation
- independent assortment
- purity of gametes
A pea plant pure for yellow seed colour is crossed with a pea plant pure for green seed colour. In the F1 generation all pea plants were with yellow seeds. Which law of Mendel is applicable?
Mendel published his work on inheritance of characters in 1865, but it remained unrecognised till 1900. Give three reasons for the delay in accepting his work.
Distinguish between monohybrid and dihybrid cross.
Define the following:
Phenotype
Choose the correct answer:
If any of Mendel's characters were linked; one would have been unable to derive.
If a pure tall plant is crossed with a pure dwarf plant, then offspring will be ______.
Give Reason:
Heritable variations are called genetic variations.
According to Mendel alleles have the following character ______.
Dominant allele refers to ______.
Genes which code for a pair of contrasting traits are known as ______.
Which of the following characters can be acquired but not inherited?
Read the following and answer from given below:
Prashant wanted to find the genotype of a pea plant bearing purple coloured flowers in his kitchen garden. For this, he crossed purple-flowered plants with white-flowered plants. As a result, all plants which were produced had purple flowers only. Upon selfing these plants, 75 purple flower plants and 25 white flowers plants were produced. Now, he can determine the genotype of a purple-flowered plant by crossing it with a white-flowered plant.
The character i.e., the purple colour of the flowers that appeared in the first filial generation is called ______
New species may be formed if
- DNA undergoes significant changes in germ cells
- chromosome number changes in the gamete
- there is no change in the genetic material
- mating does not take place
How many pairs of contrasting characters in pea bad were chosen by Mendel?
A green stemmed tomato plant denoted by (GG) is crossed with a tomato plant with purple stem denoted by (gg).
- What colour of the stem would you expect in their F1 progeny?
- In what ratio would you find the green and purple coloured stem in plants of F2 progeny?
- What conclusion can be drawn for the above observations?
Give statement of the law of dominance.
State Mendel’s Law of Segregation.
What is the scientific name of the pea plant that Mendel used for his experiments?
