Formative Practice 6.1 (Form 4 Biology Textbook Exercise and Answer)

Question 1:
Give the definition of the following terms:
(a) karyokinesis 
(b) cytokinesis 
(c) chromatin
(d) homologous chromosomes

Karyokinesis is a stage in cell division that involves the division of nucleus.

Cytokinesis is the cytoplasm division stage.

Chromatin is double-stranded DNA that is coiled around histone proteins.

Homologous chromosomes is a pair of chromosomes from the same set of chromosomes, with one chromosome from male parent and the other from female parent.

Question 2:
Predict what will happen if the cells in the reproductive organs of humans are unable to produce haploid cells.

The resulting zygote will have 92 chromosomes (46 + 46), which is double that of the parent’s chromosomes. If this happens, the zygote produced will degenerate by itself.

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