Haploid and monoploid numbers of chromosomes of hexaploid wheat are:
Correct answer: C. 21 and 7
- A. 21 and 42
- B. 7 and 21
- C. 21 and 7
- D. 42 and 21
Explanation
Wheat, Triticum, has basic chromosome number, n = 7; thus the hexaploid species (Triticum aestivum) have 6n = 42. Haploid chromosome number is the one present in gametes of that organism; gametes contain half the chromosomes of the somatic cells. Thus, haploid chromosome number of hexaploid wheat is 21. Monoploidy is presence of single basic chromosome set; thus monoploid of hexaploid wheat has x = 7 chromosomes. Correct answer is C.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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