Why is the frequency of red-green colour blindness is many times higher in males than that in the females ?
Why is the frequency of red-green colour blindness is many times higher in males than that in the females ?
Females have $XX$ chromosomes, to become colourblind both the chromosomes should have alleles for colourblindness.
However males have only one$X$ chromosome so they have more chances of colourblindness.
Similar Questions
The daughter born to haemophilic father and normal mother could be
The daughter born to haemophilic father and normal mother could be
- [AIIMS 1992]
:Match the columns :
Column $I$
Column $II$
$(a)$
Sickle cell anaemia
$(p)$
Homogentisic acid
$(b)$
Alkaptonuria
$(q)$
Lack of Melanin
$(c)$
Albinism
$(r)$
Accumulation of Amino acid
$d)$
Phenyl Ketonuria
$(s)$
Defective haemoglobin
:Match the columns :
| Column $I$ |
Column $II$ |
||
| $(a)$ | Sickle cell anaemia | $(p)$ | Homogentisic acid |
| $(b)$ | Alkaptonuria | $(q)$ | Lack of Melanin |
| $(c)$ | Albinism | $(r)$ | Accumulation of Amino acid |
| $d)$ | Phenyl Ketonuria | $(s)$ | Defective haemoglobin |
A woman has a haemophilic son and three normal children. Her genotype and that of her husband with respect to this gene would be
A woman has a haemophilic son and three normal children. Her genotype and that of her husband with respect to this gene would be
Given below is a pedigree chart showing the inheritance of a certain sex- linked trait in humans.
The trait traced in the above pedigree chart is
Given below is a pedigree chart showing the inheritance of a certain sex- linked trait in humans.
The trait traced in the above pedigree chart is
Colour blindness in man is
Colour blindness in man is