Genetics Questions

Genes for cytoplasmic male sterility in plants are generally located in :

If both parents are carriers for Thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?

In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree.

Which one of the following is not applicable to RNA?

Identify the correct order of organisation of genetic material from largest to smallest:

A gene showing codominance has:

A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughters and 5 sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease ?

A pleiotropic gene:

The term ‘’linkage’’ was coined by:

A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind?

A human female with Turner's syndrome:

In a population of $1000$ individuals, $360$ belong to genotype $AA$, $480$ to $Aa$ and the remaining $160$ to $aa$. Based on this data, the frequency of allele $A$ in the population is:

A man whose father was colour blind marries a woman who had a colour blind mother and a normal father. What percentage of male children of this couple will be colour blind?

Fruit colour in squash is an example of:

Transformation was discovered by:

In a dihybrid cross ($AaBb\times AaBb$), the phenotypic ratio of the offspring is:

Balbiani rings are sites of:

The incorrect statement with regard to Haemophilia is:

If two persons with 'AB' blood group marry and have children, the children could be classified as 'A' : 'AB' : 'B' in a $1:2:1$ ratio. Protein electrophoresis reveals presence of both 'A' and 'B' type proteins in 'AB' individuals. This is an example of:

Which of the following statements is not true of two genes that show $50\%$ recombination frequency?

$F_2$ generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as $1:2:1$. It represents a case of:

A normal-visioned man whose father was colour-blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind?

Read the following four statements (A - D):(A) In transcription, adenosine pairs with uracil.(B) Regulation of lac operon by repressor is referred to as positive regulation.(C) The human genome has approximately $50,000$ genes.(D) Haemophilia is a sex-linked recessive disease.How many of the above statements are right?

A test cross is carried out to:

In history of biology, human genome project led to the development of:

Test cross in plants or in $\text{Drosophila}$ involves crossing:

Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child?

The unequivocal proof of $\text{DNA}$ as the genetic material came from the studies on a:

Which one of the following symbols and its representation used in human pedigree analysis is correct?

Point mutation involves: