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(m)рorlani to mention here that sueh Mistielinn diserders msy be: clominail or receselve. Hy pedigree analysie ome car essily ruchersisna myident that Wita K-Imed receselve I ralt ghowes fransmisslon frotn earrier femade to male profony, A fepresentalive pedjpree ies shown in figare 5,14 for dominmit and reeerafve iraits. Discuss with your feacher srud design pedifrecta for charactet' In leed to both autosomess and sex chromosame.

1. (a)
2. (b)
3. Figure 5.14 Representative pedigree analysis of (a) Autosomal dominant trait (for Myotonic dystrophy) (b) Autosomal recessive trait (for example: Sickle-cell
4. Colour Blidness : It is a sex-linked recessive disorder due to defect in either red or green cone of eye resulting in failure to discriminate between red and green colour. This defect is due to mutation in certain genes present in the $\mathrm{X}$ chromosome. It occurs in about 8 per cent of males and only about $0.4$ per cent of females. This is because the genes that lead to red-green colour blindness are on the $\mathrm{X}$ chromosome. Males have only one $\mathrm{X}$ chromosome and females have two. The son of a woman who carries

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Updated on: Feb 3, 2023