Q4 of 32 Page 27

List any four traits in humans which you can easily study just by observing and making family charts.

(i) ……………………………


(ii)……………………………


(iii) …………………………


(iv) ………………………

The four traits which can easily studied just by observing and making family charts are:

(i) Eye colour


(ii) Right handedness or left handedness


(iii) Red – green colour blind


(iv) Rh blood group – positive or negative


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2

Define the following terms:

(i) Allele …………………………………


(ii) Dominant gene ………………………


(iii) Genotype ………………………………..


(iv) Phenotype ……………………………


(v) Heterozygous dominant ……………………

 3

Can there be a heterozygous recessive? Explain.

 1

Who discovered for the first time the basic principles of genetics?

 2

Give the common and scientific names of the Organism of which Gregor Mendel had worked.

Common name …………………………


Scientific name …………………………