The pedigree shown below cannot be:

I.	Autosomal dominant disorder
II.	Autosomal recessive disorder
III.	Sex-linked dominant disorder
IV.	Sex-linked recessive disorder
V.	Holandric disorder

 

1.	I, II, and III only	2.	I, II, III, and V only
3.	I, III, IV, and V only	4.	I, II, III, IV and V

The recombination frequencies for four different linked genes of Drosophila are shown in the figure:

The order of the four genes will be:

Given below are different levels of organization of genetic material. Arrange them in the correct descending order of their size:

The inheritance of the trait shown in the given pedigree is best explained as a/an:

1. Autosomal dominant disorder
2. Autosomal recessive disorder
3. Sex-linked dominant disorder
4. Sex-linked recessive disorder

You cross pure line plants with red flowers and pure line plants with white flowers and all progeny plants had pink flowers. What would be the phenotypic ratio of progeny produced as a result of hybridizing two plants with pink flowers?

Genetics, an important branch of biology, is best defined as:

In a dihybrid cross, AaBb x AaBb, the fraction of the offspring that will be homozygous for both traits is:

Black coat colour is a dominant trait while the albino trait is recessive in mice. You want to raise only black-coat mice as they appear more graceful to you. You crossed black mice with albino mice thinking that all progeny will be black based on dominance. You felt disappointed when your cross yielded only three black-coat mice out of seven. This is because you incorrectly:

Consider crossing over does not take place between chromosomes shown as:
(i) Chromosome 1: ABC/abc
(ii) Chromosome 2:Qr, qr.
Which of the following gametes will not be formed by this organism?

What would be the correct definition of a ‘locus’ in genetics ?