Select and fill in the boxes (i) to (vi) from given list of options.List of options — Sickle cell anaemia, Widow’s peak, Flower colour of Mirabilis, Human blood groups, Coat colour of cattle, Klinefelter’s syndrome.Genetic traitExample(a)Incomplete d…

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Q.19 Select and fill in the boxes (i) to (vi) from given list of options. List of options — Sickle cell anaemia, Widow’s peak, Flower colour of Mirabilis, Human blood groups, Coat colour of cattle, Klinefelter’s syndrome. Genetic traitExample (a)Incomplete dominance(i) (b)Pleiotropy(ii) (c)Codominance(iii) (d)Multiple allelism(iv) (e)Sex chromosomal disorder(v) (f)Autosomal disorder(vi)

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Answer: (i) Flower colour of Mirabilis (ii) Sickle cell anaemia (iii) Coat colour of cattle (iv) Human blood groups (v) Klinefelter’s syndrome (vi) Widow’s peak. Genetic traitExample (a) Incomplete dominance(i) Flower colour of Mirabilis (red × white gives pink F₁) (b) Pleiotropy(ii) Sickle cell anaemia (one mutant gene affects many characters) (c) Codominance(iii) Coat colour of cattle (red × white gives roan) (d) Multiple allelism(iv) Human blood groups (alleles I^A, I^B, i) (e) Sex chromosomal disorder(v) Klinefelter’s syndrome (44 + XXY) (f) Autosomal disorder(vi) Widow’s peak Note: widow’s peak is strictly an autosomal (dominant) trait rather than a disorder; it is the only option left for “autosomal” after the others are placed, since sickle cell anaemia (also autosomal) is needed as the example of pleiotropy.

Select and fill in the boxes (i) to (vi) from given list of options.List of options — Sickle cell anaemia, Widow’s peak, Flower colour of Mirabilis, Human blood groups, Coat colour of cattle, Klinefelter’s syndrome.Genetic traitExample(a)Incomplete d…

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	Genetic trait	Example
(a)	Incomplete dominance	(i)
(b)	Pleiotropy	(ii)
(c)	Codominance	(iii)
(d)	Multiple allelism	(iv)
(e)	Sex chromosomal disorder	(v)
(f)	Autosomal disorder	(vi)

Genetic trait	Example
(a) Incomplete dominance	(i) Flower colour of Mirabilis (red × white gives pink F₁)
(b) Pleiotropy	(ii) Sickle cell anaemia (one mutant gene affects many characters)
(c) Codominance	(iii) Coat colour of cattle (red × white gives roan)
(d) Multiple allelism	(iv) Human blood groups (alleles I^A, I^B, i)
(e) Sex chromosomal disorder	(v) Klinefelter’s syndrome (44 + XXY)
(f) Autosomal disorder	(vi) Widow’s peak