:O 2 3) The disease presented in the pedigree above is due to a dominant allele.

Question

:O 2 3) The disease presented in the pedigree above is due to a dominant allele. a) True b) False c) could be either dominant or recessive 24) The gene involved in the disease is on an autosomal chromosome. a) True b) False c) could be either X-linked or autosomal 25) What is the genotype of individual 1? a) Homozygous dominant b) Heterozygous c) Homozygous recessive d) Hemizygous dominant e) Hemizygous recessive 26) What is the genotype of individual 3? a) Homozygous dominant b) Heterozygous c) Homozygous recessive d) Hemizygous dominant e) Hemizygous recessive

Explanation / Answer

ANSWER 23
The disease presented in the pedigree above is due to a dominant allele - b) False (Since in dominant allele diseases it is compulsory for any disease showing individual to have at least one parent that shows the disease, this is not true for the third male from left in second row from top)

ANSWER 24
The gene involved in the disease is on an autosomal chromosome - a) True (Since in X-linked diseases it is compulsory for all male afflicted to pass on to all females and for all female afflicted to pass on to & AFFECT all males)

ANSWER 25
Genotype of Individual 1 - b) Heterozygous (Disease has already been proved to be recessive and autosomal, hence both parents need to at least be at the minimum carriers, to be able to transfer the disease to offspring)

ANSWER 26
Genotype of Individual 3 - c) Homozygous Recessive (Disease has already been proved to be recessive and autosomal, hence any individual needs two copies of the recessive allele to get affected)

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