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Question
What are the characteristic features of a true-breeding line?
Solution
A true-breeding line for a trait is one that, has undergone continuous self-pollination or brother-sister mating, showing stability in the inheritance of the trait for several generations.
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RELATED QUESTIONS
Considering the relationship in the first pair, complete the second pair:
rr : Homozygous : : Rr : ....................
State Mendel’s law of Dominance.
A pea plant which is homozygous for green pods which are inflated [GGII] is crossed with a homozygous plant for yellow pods which are constricted [ggii]. Answer the following questions;
a) Give the phenotype and genotype of the F1 generation.
Which type of pollination has occurred to produce F1 generation?
b) Write the phenotypic ratio of the F2 generation
c) Write the possible combinations of the gametes that can be obtained if two F1 hybrid plants are crossed.
d) State Mendel’s law of ‘Segregation of Gametes’
5) What is the scientific name of the plant which Mendel used for his experiments on inheritance?
Explain the following term : Pedigree chart
According to Mendel alleles have the following character ______.
First geneticist/father of genetics was ______.
Which one of the following characters studied by Mendel in garden pea was found to be dominant?
In Mendel's experiments, colour of seed coat, nature of flower, position of flower, colour of pod, height of stem, are called
Do you think Mendel’s laws of inheritance would have been different if the characters that he chose were located on the same chromosome.
Mendel blended his knowledge of science and mathematics to keep count of the individuals exhibiting a particular trait in each generation. He observed a number of contrasting visible characters controlled in pea plants in a field. He conducted many experiments to arrive at the laws of inheritance.
- What do the F1 progeny of tall plants with round seeds and short plants with wrinkled seeds look like?
- Name the recessive traits in the above case.
- Mention the type of the new combinations of plants obtained in F2 progeny along with their ratio, if F1 progeny was allowed to self-pollinate.
OR
If 1600 plants were obtained in F2 progeny, write the number of plants having traits:
- Tall with round seeds.
- Short with wrinkled seeds.
Write the conclusion of the above experiment.
