Which one of the following is a dominant trait
Albinism
Sickle cell anaemia
Phenylketonuria
Polydactyly
Alkaptonuria is caused due to
Mendel published his work on inheritance of characters in $1865$ but it remained unrecognised till $1900$ because
$(a)$ He could not provide any physical proof for the existence of factors
$(b)$ His concept of factors as stable, discrete units that controlled the expression of traits did not find acceptance from the contemporaries
$(c)$ Mendel's approach of using mathematics to explain biological phenomena was totally old
$(d)$ Communication was not easy (as it is now)
Two offspring developed in the same uterus but from fertilization of two different ova are
In the hexaploid wheat, the haploid $(n)$ and basic $(x)$ numbers of chromosomes are
In human the inheritance of sex linkage takes place through