Explain thalassemia.
Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character.
A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind ?
A colour blind man marries the daughter of a colour blind person. Then in their progeny
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
:Match the columns :
Column $I$ |
Column $II$ |
$(a)$ Sickle cell anaemia | $(x)$ Homogentisic acid |
$(b)$ Alkaptonuria | $(y)$ Melanin pigmentsare absent |
$(c)$ Albinism | $(z)$ More amount of phenyl alanine |
$(d)$ Phenyl Ketonuria | $(w)$ Defective haemoglobin |