Deviation From Mendelian Genetics

The fundamental cause of the sickle-cell disease is a change in the structure of:

A plant of Antirrhinum majus with red flowers was crossed with another plant of the same species with white flowers. The plants of the F₁ generation bore pink flowers. The pattern of inheritance is exhibiting:

A woman with blood group O married a man with AB group. The possible genotype of their progeny would be:

A plant of Antirrhinum majus with red flowers was crossed with another plant of the same species with white flowers. The plants of the F₁ generation bore pink flowers. The pattern of inheritance is exhibiting:

Which one of the following pairs of features is an excellent example of polygenic inheritance?

Grain colour in wheat is determined by three pairs of polygene. Following the cross AABBCC (dark colour) and aabbcc (light colour), in $F_2$ generation, what proportion of the progeny is likely to resemble either parent?

Which kind of inheritance is shown by human blood group?

(i) Incomplete dominance

(ii) Co-dominance

(iii) Multiple allele

(iv) Pleiotropy

The phenotype of one parent for skin colour is $\mathrm{AABBCC}$ and other parent is $\mathrm{aabbcc}$. What will be the skin colour and genotype for their progeny?

Which characteristic feature of the dog flower plant shows incomplete dominance?

Which phenomenon is nullified by the Law of segregation?

Identify the incorrect match:

A baby of blood group A cannot belong to parents of blood group:

Children of a father with '$\mathrm{O}$' blood group and mother of $\mathrm{AB}$ blood group could have blood group:

Three children of a family have $A,O$ and $B$ blood-groups. The genotypes of the parent’s blood groups could be:

Which of the following is an example of incomplete dominance?