The polyploids which have evolved from plants with the lower chromosome number by a direct increase of the number are called allopolyploid.

True

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False

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Solution

The correct option is B False
The allopolyploids are composed of sets of chromosomes from different species. Allopolyploid arise as a result of multiplication of the chromosome of a hybrid between two different species. Allopolyploids generally combine the morphological and physiological characteristics of the different parent species. Allopolyploidy are used in crop improvement.
So the given statement is false.

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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.

Q. Assertion :The process of speciations occurs in allopatric populations. Reason: The sympatric species can arise either due to changes in the chromosome number or due to introgressive hybridization and polyploidy.

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