Do larger organisms have more number of chromosomes / cells?

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Solution

It is not necessary that the larger organisms have a large number of chromosomes. Humans have 23 pairs of chromosomes. However, there are smaller organisms which have more than 23 chromosomes. For example, a horse has 32 pairs of chromosome. Ichthyomys pittieri, a water-loving rodent has 47 pairs of chromosomes.

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Question 36
From the internet, gather information about the chromosome numbers of five animals and five plants. Correlate the number with the size of an organism and answer the following questions.

(a) Do larger organisms have more number of chromosomes/cells?

(b) Can organism with fewer chromosomes reproduce more easily than organisms with more number of chromosomes?

(c) More the number of chromosomes/cells greater is the DNA content. Justify.

Chromosomes are present inside the nucleus of cells. There are ___________ pairs of chromosomes found in human beings. A pair of corresponding chromosomes of the same size and shape is called a __________________ pair. In the pair both parents contribute one chromosome.

Haploid cells have only ______________ the chromosomes of diploid cells. If an organism has more than a pair of homologous chromosomes, the organism is said to be ______________________________. E.g.: ____________________________. The number of chromosomes varies from organisms to organisms.

Q. In which of the following group of organisms chromosomes do not have histone proteins but nuclear membrane and nucleolus remain present even during cell division?

why do sex cells have only half no. Of chromosomes than other cell.

Why are larger organisms made up of greater number of cells ?

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