CBSE
Which of the following condition is called monosomic?
2n + 1
2n + 2
n + 1
2n - 1
Test cross is a cross between
hybrid and dominant parent
hybrid and recessive parent
two hybrid parents
two distantly related species
How many pairs of contrasting characters in pea pod were chosen by Mendel?
3
5
7
9
A character, which is expressed in a hybrid is called
dominant
co-dominant
recessive
epistaticn
Polyploid derived from two different species is called
autopolyploid
triploid
allopolyploid
monoploid
What is a test cross? Why is it so named?
If a cross between two individuals produces offsprings with 50% dominant character (A) and 50% recessive character (a) the genotype of parents are
Aa Aa
Aa aa
AA aa
AA Aa
Which pairs of the following diseases are caused by two genes located on human X-chromosomes?
Colour blindness and phenylketonuria
Colour blindness and haemophilia
Colour blindness and albinism
Colour blindness and hypertrichosis
Which of the following is correct
Haemophilic-Y-chromosome
Down's syndrome-21' chromosome
Sickle cell anaemiaX-chromosome
Parkinson's disease-X and Y-chromosome
The gene of sickle cell anaemia is inherited by
blood cells
bone cells
sex chromosomes
autosomes