Principles of I...

A person with unknown blood group under ABO system has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend, who has a valid certificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?

Which of the following is an example of co-dominance?

What gametes are produced by a Vv heterozygous plant?

In a given plant, red colour (R) of fruits is dominant over white fruit (r): and tallness (T) is dominant over dwarfness (t). If a plant with genotype RRTt is crossed with a plant of genotype rrtt, what will be the percentage of tall plants with red fruits in the next generation?

What will be expected blood groups in the off spring when there is a cross between AB blood group mother and heterozygous B blood group father?

Assertion: An organism with lethal mutation may not even develop beyond the zygote stage.

Reason: All types of gene mutations are lethal.

Deviation from Medelism ’s occurs due to
a. Multiple alleles
b. Co dominance
c. Linkage and crossing over
d. Independent assortment

Chromosomal theory of inheritance was experimentally verified by T.H.Morgan and his colleagues working with tiny flies:

Chromosome theory of XY sex determination was proposed by:

Crossing over occurs at:

Which organism ’s male contain a pair of Z chromosome as sex chromosome besides autosomes?

Linkage is the_________.

On the basis of sex chromosome shown below, the bird shown is:

Two genes p and q showing 1.3% of recombination while other two genes x and y show 37.2 percent of recombination. Which pair of genes is close to each other?

Assertion: In human beings, 23 pairs of chromosomes are present in diploid cells.

Reason: 22 pairs of chromosomes are equal in male and female but a pair sex chromosome is different in them.