CBSE
Multiple Choice QuestionsThe incorrect statement with regard to haemophilia is
it is a sex-linked disease
it is a recessive disease
it is a dominant disease
a single protein involved in the clotting of blood is affected
The frequency of crossing-over occurring between two genes located on the same chromosome depends on
length of the chromosome
position of the centromere
activities of two genes
distance between two genes
A man having the genotype EEFfGgHH can produce P number of genetically different sperms and a woman of genotype IiLLMmNn can generate Q number of genetically different eggs. Determine the values of P and Q.
P - 4; Q - 4
P - 4; Q - 8
P - 8; Q - 4
P - 8; Q - 8
Which one of. the following animals possesses giant chromosome?
Drosophila
Mouse
Pigeon
Elephant
If two persons with 'AB' blood group marry and have sufficiently large number of children, these children could be classified as 'A' blood group : 'AB' blood group : 'B' blood group in 1 : 2 : 1 ratio. Modern technique of protein electrophoresis reveals presence of both 'A' and 'B' type proteins in 'AB' blood group individuals. This is an example of
codominance
incomplete dominance
partial dominance
complete dominance
Anish is having colour blindness and married to Sheela, who is not colourblind. What is the chance that their son will have the disease?
100%
50%
25%
0%
Which Mendelian idea is depicted by a cross in which the F1 generation resembles both the parents?
Incomplete dominance
Law of dominance
Inheritance of one gene
Codominance
In an organism, tall phenotype is dominant over recessive dwarf phenotype and the alleles are designated as T and t, respectively. Upon crossing two different individuals, total 250 offsprings were obtained, out of which 124 displayed tall phenotype and rest were dwarf Thus, the genotype of the parents were
TT TT
TT tt
Tt Tt
Tt tt
If both parents are carriers for thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?
No chance
50%
25%
100%
Which of the, following statements is not true of two genes that show 50% recombination frequency?
the genes may be on different chromosomes
the genes are tightly linked
the genes show independent assortment
if the genes are present on the same chromosome, they undergo more than one cross overs in every meiosis
