Correct Option (c)
Reason : The recessive genes located on X-chromosome in humans are always expressed in males because a female may be homozygous or heterozygous while male is always hemizygous (i.e. only one allele is present). Haemophilia, colour blindness are some human diseases which are frequently found in males.
Correct Option (c) Reason : The recessive genes located on X-chromosome in humans are always expressed in males because a female may be homozygous or heterozygous while male is always hemizygous (i.e. only one allele is present). Haemophilia, colour blindness are some human diseases which are frequently found in males.