Question
Some insects can reproduce by sexual reproduction and asexual reproduction. In both types of
reproduction chromosomes are passed from the parent or parents, to the offspring.
Fig. 9.1 shows a drawing of a parent insect and seven of her offspring: M, N, P, R, S, T and U.
(a) (i) Two of the offspring were produced by asexual reproduction.
Suggest the letters representing these two offspring.
1 ……………………..
2 ……………………..
(ii) Insect R was produced by sexual reproduction.
Use the information from the diagram to support this statement.
(iii) State the term that is defined as the observable features of an organism.
(b) Fig. 9.2 shows a group of male students. They are all the same age.
(i) The students in Fig. 9.2 show continuous variation in some of their characteristics.
State three characteristics in which these students show continuous variation.
1
2
3
(ii) State one example of discontinuous variation.
Answer/Explanation
Ans
(a)(i) N and S ;
(a)(ii) R has different characteristics to the parent / has dark eyes / knobs on the
end of antennae / knobs on abdomen ;
(a)(iii) phenotype ;
(b)(i) height ;
weight ;
skin colour ;
hair colour ;
AVP ;;; e.g. leg length / arm length
(b)(ii) tongue rolling / gender / AVP ;