Question

Attempt the following questions and turn in or hand in in the Assignment tab of XII Biology Team. Last date for submission is 18.9.20 by 5 p.m.

Q.1. Given below are some pedigree charts. Study these carefully and:

(a) Identify the inheritance pattern observed. Match them with the correct inheritance pattern. (1 * 5 = 5)

(b) State two reasons to justify your answer. (2 * 5 = 10)

(c) Give one example of any disease or a trait that follows the inheritance pattern. (1 * 5 = 5)

(d) State the genotype of the individual II – 5 in each pedigree.

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Answer 1

Answer:

c There are five basic modes of inheritance for single-gene diseases: autosomal dominant, autosomal recessive, X-linked dominant, X-linked recessive, and mitochondrial. Genetic heterogeneity is a common phenomenon with both single-gene diseases and complex multi-factorial diseases.