IGCSE Biology Paper-2: Specimen Questions with Answers 146 - 146 of 203

Question 146

Question

MCQ▾

The diagram shows a diploid cell and alleles Y and on one pair of chromosomes.

A Diploid Cell and Alleles Y and Y

When this cell divides by mitosis, which daughter cells will be produced?

Choices

Choice (4)

a.

Chromosome number-Diploid, Genotype-Heterozygous

b.

Chromosome number-Diploid, Genotype-Homozygous

c.

Chromosome number-Haploid, Genotype- Homozygous

d.

Chromosome number-Haploid, Genotype-Heterozygous

Answer

a.

Explanation

Features of Mitosis:

  • Mitosis leads to production of two daughter cells from a mother cell in each cycle of cell division. In other words, nucleus divides once in each cell cycle.
  • The daughter cells are similar to the mother cell in shape, size, and chromosome complement. Since the chromosome number is the same in the daughter cells as compared to that of mother cell, this is also known as homotypic or equational division.
  • In plants, mitosis takes place in somatic organs like root tip, stem tip and leaf base. It leads to growth of vegetative parts.
  • The complete process of mitosis consists of only one homotypic or equational division.
  • Segregation and recombination do not take place during mitosis.

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