Study the pedigree chart given below to identify the disorder
(1) Sickle cell anaemia
(3) Myotonic dystrophy
What does the given pedigree chart shows?
(1) Sex-linked recessive trait
(2) Sex-linked dominant trait
(3) Inheritance of Sickle cell anaemia
(4) Inheritance of autosomal dominant trait
Which of the following statements are correct with respect to aneuploidy?
(i) Aneuploidy is caused due to failure of segregation of chromatids
(ii) Aneuploidy is caused by due to failure of segregation of alleles
(iii) Aneuploidy results into loss or gain of chromosomes.
(iv) Aneuploidy always results into gain of chromosomes.
(v). Down’s syndrome is caused due to aneuploidy in chromosome 21.
(1) (i), (iv) and (v)
(2) (ii), (iii) and (v)
(3) (i), (ii) and (iv)
(4) (i), (iii) and (v)
Which of the following statements are correct?
(i) Polyploidy is caused due to failure of cytokinesis after telophase.
(ii) polyploidy results into increase in number of autosomes
(iii) Turner’s syndrome is an example of polyploidy
(iv) polyploidy results into an increase in a whole set of chromosomes
(1) (i) and (ii)
(2) (i) and (iii)
(3) (ii) and (iii)
(4) (i) and (iv)
A man who is achondroplastic dwarf with normal vision marries a color-blind woman of normal height. The man's father was six feet tall, and both the woman's parents were of average height. Achondroplastic dwarfism is autosomal dominant, and red-green color blindness is X- linked recessive. What proportion of their sons would be color-blind and of normal height ?
4. One out of four
Sex determination in Honey bee depends upon-
What is wrong with respect to sex determination in honey bee?
What is the characteristic feature of haplodiploid sex determination?
Colour Blindness is ------- due to defect in either----- or---- ------ of eye.
In case of Pea plant, grey seed colour (G) is dominant to white (g). If the progenies are formed in the following phenotypic ratio, find the genotypes of parents.
Grey was crossed with white, 49 grey and 54 white were formed. The genotype of the grey parent will be