Principle of inheritance and variation practice · Mixed difficulty

In rabbit, two recessive genes produce a solid body colour and long hair in contrast to dominant spotted body colour and short hair. The result of a cross between heterozygous spotted short haired rabbit to solid long haired rabbit gives spotted, short haired 48, spotted long haired 5, solid short haired 7, solid long haired 40, total 100. In terms of cross over units, how far are these two genes on the chromosome?

Red green colour blindness appears due to

Number of Barr body which will found in case of Turner's
syndrome will be

In a dihybrid cross between RRYY and rryy parents, the number of RrYy genotypes in ${F_2}$ generation will be

The reason why some mutations which are harmful do not get eliminated from gene pool is that:

Ratio observed in dihybrid cross (phenotypically)

Assertion : A women can go to the court if a
man refuses to own his child. He has blood
group B and women has A while child has O.

Reason : Genetically she is right he can be
father of the child.

The diagrammatic representation of the chromosomes of an individual is called

Linkage was first suggested by

The phenotype of an individual may be affected if the modified allele produces

A. The normal / less efficient enzyme

B. No enzyme at all

C. A non-functional enzyme

Assertion (A): In co-dominance and incomplete dominance, the genotypic & phenotypic ratios are same.

Reason (R): In case of co-dominance the $F_1$ generation resembles both parents.

External morphology or appearance or descriptive term of an genotype is called

In Down syndrome:

Mutations are generally induced by means of

Number of chromosomes present in the meiocyte of house fly is

Ratio of progeny, when a red coloured heterozygote is crossed with a white coloured plant in which red colour is dominant to white colour

Females are heterogametic in all except

The chromosome constitution 2n-2 of an organism represents

Assertion: To study mutation, haploids are used.

Reason: Most of the mutations are recessive.

A cross between two plants of Pisum sativum having violet coloured flowers, resulted in production of few plants producing white flowers. What would be the genotype of the parent plants?

Which of these is a dominant factor?

Number of chromosomes are different in male and female individuals in

Genetics is the branch of biology which deals with

In sex linkage, the speciality is

Assertion : Haemophilia never occurs in women.

Reason : Gene for haemophilia is located on X
chromosome.

A child of blood group-O cannot have parents of blood groups

The phenomenon in which a single gene can exhibit multiple phenotypic expression is called

What are all the chances of colourblind daughters of a normal man marrying normal women whose father was colourblind?

I. Short statured with small round head
II. Furrowed tongue and partially opened mouth
III. Palm is broad with characteristic palm crease
IV. Slow physical, psycomotor and mental development
These are the characters of

$\left( N \right) \times \left( {N + 1} \right)$ gametic combination will cause which of the following types of mutation?