Which of the following statements are correct about Klinefelter's Syndrome?
A. This disorder was first described by Langdon Down (1866).
B. Such an individual has overall masculine development. However, the feminine development is also expressed.
C. The affected individual is short statured.
D. Physical, psychomotor and mental development is retarded.
E. Such individuals are sterile.
Choose the correct answer from the options given below:

If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness ?

Given below are two statements:
Statement I : Mendel studied seven pairs of contrasting traits in pea plants and proposed the Laws of Inheritance.
Statement II: Seven characters examined by Mendel in his experiment on pea plants were seed shape and colour, flower colour, pod shape and colour, flower position and stem height.
In the light of the above statements, choose the correct answer from the options given below:

In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F₁ generation, pink flowers where obtained. When pink flowers were selfed, the F₂ generation showed white, red from and pink flowers.
Choose the incorrecct statement from the following:

A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by

A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F₁ plants were selfed, the resulting genotypes were in the ratio of

In context of amniocentesis, which of the following statement is incorrect ?

What is the pattern of inheritance for polygenic trait?

Genes R and Y follow independent assortment. If RRYY produce round yellow seeds and rryy produce wrinkled green seeds, what will be the phenotypic ratio of the F2 generation?

With the help of given pedigree, find out the probability for the birth of a child having no disease and being a carrier (has the disease mutation in one allele of the gene) in F3 generation.

Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true?

A pink flowered Snapdragon plant was crossed with a red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?

Match List I with List II:

Choose the correct answer from the options given below:

Which one of the following can be explained on the basis of Mendel's law of Dominance?
A. Out of one pair of factors one is dominant and the other is recessive.
B. Alleles do not show any expression and both the characters appear as such in F2 generation.
C. Factors occur in pairs in normal diploid plants.
D. The discrete unit controlling a particular character is called factor.
E. The expression of only one of the parental characters is found in a monohybrid cross.
Choose the correct answer from the options given below:

In a plant, black seed color (BB/Bb) is dominant over white seed color (bb). In order to find out the genotype of the black color seed plant, with which of the following genotype will you cross it?

Which one of the following factors will not affect the Hardy-Weinberg equilibrium?

Match List I with List II:

Choose the correct answer from the options given below:

As per ABO blood grouping system, the blood group of father is B⁺, mother is A⁺ and child is O⁺.
Their respective gentype can be
A. I^Bi / I^Ai / ii
B. I^BI^B / I^AI^AI / ii
C. I^AI^B /i I^AI /I^Bi
D. I^Ai / I^Bi /I^Ai
E. iI^B / iI^A / I^AI^B
Choose the most appropriate answer from the options given below:

Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first tìme by

Broad palm with single palm crease is visible in a person suffering from:

Which one of the following symbols representsmating between relatives in human pedigree analysis?

The phenomenon of pleiotropism refers to

XO type of sex determination can be found in

Which of the following occurs due to the presence of an autosome linked dominant trait?

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Mendel's law of Independent assortmnent does not hold goods for the genes that are located closely on the same chromosome.
Reason (R) : Closely located genes asSort independently.
Answer from the options given below:

The recombination frequency between the genesa &c is 5%, b & c is 15%, b & d is 9%o, a & b is 20%,c & d is 24% and a & d is 29%. What will be thesequence of these genes on a linear chromosome?

The Adenosine deaminase deficiency results into:

DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as:

In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased?

ldentify the wrong statement with reference to the gene 'l' that controls ABO blood groups.

Experimental verification of the chromosomal theory of inheritance was done by:

How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits ?

What map unit (Cenimorgan) is adopted in the construction of genetic maps ?

The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by

What is genetic disorder in which an individual has an overall masculine develop-ment, gynaecomastia and is sterile ?

Which of the following pairs is wrongly matched?

Select the correct statement.

Which of the following characteristics represent Inheritance of blood groups' in humans?
A. Dominance
B. Co - dominance
C. Multiple allele
D. Incomplete dominance
E. Polygenic inheritance

Among the following characters, which one was not considered by Mendel in his experiments on pea ?

Which one from the given below is the period for Mendel's hybridization experiments ?

The genotypes of a Husband and Wife are I^AI^B and I^Ai. Among the blood types of their children, how many different genotypes and phenotypes are possible ?

Pick out the correct statements
I. Haemophilia is a sex linked recessive disease
II . Down's syndrome is due to aneuploidy
III . Phenylketonuria is an autosomal recessive gene disorder
IV . Sickle cell anaemia is an X linked recessive gene disorder

In a test cross involving F₁ dihybrid flies, more parental-type offspring were produced than the recombinant type offspring. This indicates

Match the terms in Column I with their description in Column II and choose the correct option.

Which of the following most appropriately describes haemophilia ?