Question:

In which one of the following options, the number of chromosomes in the present day hexaploid wheat are correctly represented ?

Updated On: Jun 7, 2022
  • Monosomic - 21, Haploid - 28, Nullisomic - 42, Trisomic - 43
  • Monosomic - 7, Haploid - 28, Nullisomic - 40, Trisomic - 42
  • Monosomic - 21, Haploid - 7, Nullisomic - 42, Trisomic - 43
  • Monosomic - 41, Haploid - 21, Nullisomic - 40, Trisomic - 43
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The Correct Option is D

Solution and Explanation

The common wheat is hexaploid with 2n = 42. It is an allopolypoid derived from three diploid species each with 2n = 14. As for it 2n = 42, thus its haploid set will have 21 chromosomes, monosomic (2n - 1) will have 41 chromosomes, nullisomic (2n - 2) will have 40 chromosomes, and trisomic (2n + 1) will have 43 chromosomes.
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Animal Husbandry

The raising and breeding of livestock are known as animal husbandry. Dairy farm management and fisheries are also included under animal husbandry and responsible for the selection of good breeds for better yield, maintaining a well-ventilated house and proper cleanliness and hygiene, and regulating proper disposal of waste.

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The practice of raising a group of animals belonging to a common species. Inbreeding and outbreeding are the two types of animal breeding.

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  2. The breeding involving animals that are not related is known as outbreeding.
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In order to get rid of nutrient deficiency diseases, crops need to have a specific nutrient value besides disease resistance, pest resistance, and high yield capacity. There are many strategies for enhancing food production through plant breeding.

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