Science (English Medium) Class 12 - CBSE Question Bank Solutions for Biology

Which was the last human chromosome to be completely sequenced?

Diploid chromosome number in humans is ______.

Both husband and wife have normal vision though their fathers were colourblind. The probability of their daughter becoming colourblind is ______.

Haemophilia is more common in males because it is a ____________.

A colourblind girl is rare because she will be born only when ______.

A colourblind mother and normal father would have ______.

Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on ______.

Of both normal parents, the chance of a male child becoming colourblind are ______.

Genes located on Y-chromosome are ______.

A colourblind woman marries a normal visioned male. In the offspring ______.

The polytene chromosomes were discovered for the first time in ______.

Human genome consists of approximately ______.

Estimated number of genes in human beings is ______.

Give any six features of the human genome.

How has the sequencing of human genome opened new windows for treatment of various genetic disorders. Discuss amongst your classmates.

The total number of genes in humans is far less (< 25,000) than the previous estimate (upto 1,40,000 gene). Comment.

Now, sequencing of total genomes getting is getting less expensive day by the day. Soon it may be affordable for a common man to get his genome sequenced. What in your opinion could be the advantage and disadvantage of this development?

Give an account of the methods used in sequencing the human genome.

Human Genome Project (HGP) was a mega project launched in the year 1990 with some important goals.

Enlist any four prime goals of HGP.

Human Genome Project (HGP) was a mega project launched in the year 1990 with some important goals.

Name any one common non-human animal model organism which has also been sequenced thereafter.