Principles of I...

When alleles of two contrasting characters are present together, one of the character express and the other remains hidden. This is the________.

The genotypic ratio of a monohybrid cross is____.

The geometrical device that helps to find out all the possible combinations of male and female gametes is called?

Which of the following terms represent a pair of contrasting characters?

The crossing of F1 to any one of the parents is called?

In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt:

If two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, 75% of the flowers are red and 25% are white. The genotypic constitution of the parents having red coloured flowers will be

F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents in case of

Which of the following statements is true regarding the “law of independent assortment”?

In Mendel's experiments with garden pea, round seed shape (RR) was dominant over Wrinkled Seeds (rr), Yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected Phenotypes in the F2 generation of the cross RRYY x rryy?

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?

A self-fertilizing trihybrid plant forms:

In the hexaploid wheat, the haploid (n) and basic (X) numbers of chromosomes are _____.

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.