Please enter your email:

Independent assortment of genes does not take place when


Barr body in mammals represents


Initial clue about the genetic/chromosomal mechanism of sex-determination can be traced back to some of the experiments carried out in


If a homozygous red flowered plant is crossed with a homozygous white flowered plant, the offsprings would be


Bird females have chromosome arrangement as


Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II


Which of the following is not a dominant trait in edible pea?


A gene pair hides the effect of another gene. The phenomenon is


Select the correct statement from the ones given below with respect to dihybrid cross.


The dihybrid ratio in F2 – generation is


At a particular locus, frequency of allele A is 0.6 and that of allele a is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium?


Primary source of allelic variation is


In which of the sex determination both male and female have same number of chromosomes?


Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to


Gene pool is referred to


When a pink flowered Antirrhinum plant is test crossed, then phenotypic ratio in resulting progenies is


Given below is a highly simplified representation of the human sex chromosomes from a karyotype.

The genes a and b could be of


Which one is a hereditary disease ?


Mark the odd one (w.r.t. true breeding line)


The distance between the genes is measured by


Sickle cell-anaemia disorder arises due to


Select the incorrect statement from the following:


Mark the odd one (w.r.t. F2 generation of Mendelian dihybrid cross)


Absence or excess or abnormal arrangement of one or more chromosomes results in


Individuals having homomorphic sex chromosomes produce


Three children in a family have blood types O, AB and B respectively. What are the genotypes of their parents?


The most striking example of point mutation is found in a disease called


When Mendel self hybridised the F1 plants (RrYy), he found that dominant and recessive traits of one character are segregated in a


Cystic fibrosis, Myotonic dystrophy and Thalassemia are


Which of the following abnormalities is due to autosomal dominant mutation?


XO-chromosomal abnormality in human beings causes


Frame shift mutation occurs when


When one gene controls two or more different characters simultaneously, the phenomenon is called


In garden pea, starch is synthesised effectively in


Generation of non-parental gene combinations is termed as


ABO blood group system is due to


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


Red (RR) Antirrhinum is crossed with white (WW) one. Offspring RW are pink. This is an example of


Chromosomal theory of inheritanc was given by


The basis of karyotaxonomy is


Given below is a representation of a kind of chromosomal mutation. What is the kind of mutation represented?


Phenylketonuria is an inborn error of metabolism that is inherited as


Mark the odd one w.r.t. syndrome which occur due to failure of segregation of homologous pair of chromosomes during cell division cycle.


Which of the following disorder is seen in human female only?


Which of the following is incorrect regarding ZW-ZZ type of sex determination?


Question 1 of 45