Q2 of 32 Page 32

Name two animals which have nineteen pairs of chromosomes.

Lion and tiger have nineteen pairs of chromosomes (38 chromosomes).

Which one of the following is the phenotypic monohybrid ratio in an F₂ generation?

Match the terms in column I with their explanations in column II.

Column I (Term)	Column II (Explanation)
a. Genetics	(i) Chromosomes similar in size and shape
b. Autosomes	(ii) The alternative forms of a gene
c. Recessive gene	(iii) Study of laws of inheritance of characters
d. Allele	(iv) A gene that can express only when in a similar pair
e. Homologous Chromosomes	(v) Chromosomes other than the pair of sex chromosomes.

Name any two genetic diseases in humans.

Which one of the following genotypes is homozygous dominant and which one homozygous recessive in regard to tongue rolling: Rr, IT, RR

Questions · 32

3. Genetics - Some Basic Fundamentals

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