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प्रश्न
उत्तर
(i) Incomplete Dominance - In few cases, F1 generation has an intermediate phenotype between dominant and recessive alleles.
(ii) Linkage - Genes on the same chromosomes are said to be linked and are inherited together.
(iii) Multiple Allelism - Each character may have more than two alleles which can't be explained by Mendel's laws.
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संबंधित प्रश्न
Define the following:
Genotype
Predict the genotype and phenotype of the following cross in pea.
tt x TT
(Capital letters show dominance)
Multiple Choice Question
What is the effect of sexual reproduction?
The pairs of contrasting character (traits) of Mendel are called ______.
Which one of the following characters studied by Mendel in garden pea was found to be dominant?
Read the following and answer from given below:
According to Mendel, one gene controls the expression of one character only. The ability of a gene to have multiple phenotypic effects because it influences a number of characters are an exception. The gene has multiple phenotypic effects because its ability to control two or more characters can be seen in cotton. In cotton, a gene for the lint also influences the height of the plant, size of the ball, number of ovules, and viability of seeds.
Which of the following statements is not correct regarding genes with multiple phenotypic effects?
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.
At which stage, did Mendel observe the segregation of alleles in garden pea plants?
Tall pea plants having green pods were crossed with dwarf pea plants having yellow pods. Out of 80 plants, how many are likely to be tall plants in the F2 generation?
Enumerate the cause and the characteristic symptom of PKU.
