Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Principles of Inheritance and Variation question

2000 · Q59
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Biology
  4. /Principles of Inheritance and Variation
  5. /2000 · Q59

Principles of Inheritance and Variation question

2000 · Q59

NEETBiologyPrinciples of Inheritance and VariationMCQ+4 / −1
In Drosophila the XXY condition leads to femaleness whereas in human beings the same condition leads to Klienfelter's syndrome in male. It proves :
  1. A
    Y chromosome is active in sex determination in both human beings and Drosophila
  2. B
    In Drosophila Y-chromosome decides femaleness
  3. C
    Y chromosome of man have genes for syndrome
  4. D
    In human beings Y chromosome is active in sex determination
View written solutionFree

Correct answer: D

Y-chromosome does not play any role in determination of sex in Drosophila. In human being, XXY is phenotypically male with underdeveloped testes, gynecomastia and often mental retardation. It is caused by the union of a non-disjunct XX egg and sperm and a normal X egg and abnormal XY sperm. This indicates that in human being Y chromosome is active in sex determination.

PreviousNext

More from Principles of Inheritance and Variation

  • According to mendelism which character is showing dominance ?2000 · MCQ
  • Due to the cross between TTRr × ttrr the resultant progenies showed how many percent plants tall, red flowered :2000 · MCQ
  • Mongolian idiots are due to trisomy in 21st chromosome is called :2000 · MCQ
  • Erythroblastosis foetalis is caused when :2000 · MCQ
  • What is the pattern of inheritance for polygenic trait?2025 · MCQ
  • With the help of given pedigree, find out the probability for the birth of a child having no disease and being a carrier (has the disease mutation in one allele of the gene) in F3​ generation. Includes diagram2025 · MCQ
  • Genes R and Y follow independent assortment. If RRYY produce round yellow seeds and rryy produce wrinkled green seeds, what will be the phenotypic ratio of the F2 generation?2025 · MCQ
  • Which one of the following can be explained on the basis of Mendel's Law of Dominance? A. Out of one pair of factors one is dominant and the other is recessive. B. Alleles do not show any expression and both the characters appear as such…2024 · MCQ