Multiple Choice QuestionsWhich enzyme/s will be produced in cell in which there is a non-sense mutation in the lac Y gene?
beta - galactosidase
Lactose permease
Transacetylase
A gene showing codominance has:
One allele dominant on the other
alleles tightly linked on the same chromosome
alleles that are recessive to each other
alleles that are recessive to each other
In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree. 
Autosomal dominant
X-linked recessive
Autosomal recessive
Autosomal recessive
A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind?
0.5
1
Nil
Nil
In his classic experiments on pea plants, Mendel did not use
Seed colour
Pod length
Seed shape
Seed shape
Fruit colour in squash is an example of
recessive epistasis
dominant epistasis
complementary genes
complementary genes
A normal-visioned man whose father was colour-blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind?
100%
0%
25%
25%
F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1:2:1. It represents a case of
codominance
dihybrid cross
monohybrid cross with complete dominance
monohybrid cross with complete dominance
A human female with Turner's syndrome
has 45 chromosomes with XO
has one additional X - chromosome
exhibits male characters
exhibits male characters
A.
has 45 chromosomes with XO
Turner syndrome is a chromosomal condition that affects the development in females. The most common feature of Turner syndrome is short stature, which becomes evident by the age of about 5. An early loss of ovaries develop normally at first, but egg cells usually die prematurely and most ovarian tissue degenerates before birth. In other words, the absence of one of the X - chromosome i.e., 45 with XO (or 44 + XO).
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