Genetics, Molecular Biology and Evolution-Sex Chromosomes [IAS (Admin.) Mains Botany]: Questions 1 - 2 of 2

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Question 1

Appeared in Year: 2014 (IFS)

Describe in Detail Subjective▾

What is accounted for by Lyon՚s hypothesis? Cite an example. (Paper 2 - Section A)

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Explanation

The Lyon՚s Hypothesis

  • The Lyon՚s hypothesis was described by Mary Lyon in 1962.
  • The Lyon՚s hypothesis does not related to germ cells and explains the phenomenon of heterozygous female carries of X-lined recessive disorders showing features of the condition.
  • The Lyon՚s hypothesis was also explains the phenomenon of Barr bodies.
  • The Lyon hypothesis relat…

… (327 more words, 15 figures) …

Question 2

Appeared in Year: 2020

Describe in Detail Subjective▾

Describe the significance and uses of the following: Male Sterility

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Explanation

Male Sterility

  • Male sterile plants develop from the lack of pollen production. Male sterile mutants occur in certain agricultural plants, and their inheritance follows one of two patterns: those in which the characteristic is acquired by a single recessive chromosomal gene segregating in Mendelian ratios, or those that exhibit maternal transmission.…

… (328 more words) …