A normal woman whose father was colourblind marries a normal man. What kinds of children would be expected and in what proportion
Daughters normal, $50\%$ of sons colourblind
Daughters normal, all sons colourblind
$50\%$ of daughters colourblind, all sons normal
All daughters colourblind, sons normal
Sickle cell anaemia is due to
: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 |
A colourblind daughter is born when
Colourblindness is caused due to
Following characters are indicate
$(i)$ presence of sickle - shaped $RBC$
$(ii)$ Blood not clot, non stop bleeding
$(iii)$ The heterozygous female transmit the disease to sons.
$(iv)$ Both heterozygous parents transmit the disease to offspring