Page 238 - SUBSEC October 2017_Neat
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(b) Using quantative information from the graphs drawn on page 12, comment of the effect
of birth-weight on percentage mortality.
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[3 marks]
(c) What effect would the observations you made in (b) have on the gene pool controlling the
birth-weight of the foetus?
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[1 mark]
(d) In terms of Natural Selection, what type of selection is operative in (c) above?
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[1 mark]
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(e) Two special groups, the Masai and the Pygmies have different anthropomorphic
measurements. The Masai people are typically over six feet in height, white and tall.
Pygmy people rarely exceed 4’ 8” in height.
Draw TWO additional graphs on Figure 2 as follows:
(i) A graph line to represent the expected percentage mortality of babies in relation
to birth-weight born in Masai.
(ii) A graph line to represent the expected percentage mortality of babies in relation to
birth-weight born to Pygmies.
[2 marks]
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