Question

If a trait is X-linked recessive, who would express the trait?

a) the same proportions for females and males
b) homozygous recessive females and hemizygous recessive males
c) homozygous dominant females and hemizygous recessive males
d) heterozygous dominant females and hemizygous dominant males
e) heterozygous recessive females and hemizygous dominant males

Answer 1

Option A

Step-by-step explanation:

• X linked recessive traits are seen in females who have homologous recessive X chromosomes and in hemizygous males .
• Females have two X chromosomes , so in order to have show recessive phenotype both pair of alleles should be recessive.
• If only one recessive allele is present in female then it's effect would be masked by the dominant allele.
• In males there is only one X chromosome , so even if they have one recessive chromosome they will show the recessive phenotype.
• Some examples of X linked recessive traits are Hemophilia , colour blindness, etc