Practice Test

Q1) Among the seven pairs of contrasting traits in pea plant as studied by Mendel, the number of traits related to flower , pod and seed respectively were Show Answer

Q2) _____ pairs of contrasting traits were studied by Mendel in pea plant. Show Answer

Q3) The colour based contrasting traits in seven contrasting pairs, studied by Mendel in pea plant were Show Answer

Q4) Which of the following are reasons for Mendel's success?
(a) usage of pure lines or pure breeding varieties.
(b) Consideration of one character at a time.
(c) Maintenance of statistical records of experiments .
(d) Knowledge of linking and incomplete dominance. Show Answer

Q5) Which of the following characters was not chosen by Mendel ? Show Answer

Q6) Read the given statements and select the correct option .
Statement 1: Mendel worked on garden pea (Pisum sativum ).
statement 2: Garden pea belongs to family Malvaceae. Show Answer

Q7) ABO blood grouping in human beings cites the example of Show Answer

Q8) Some of the dominant traits studied by Mendel were Show Answer

Q9) Genes which code for a pair of contrasting traits are known as Show Answer

Q10) The inheritance of flower colour in Antirrhinum (dog flower ) is an example of Show Answer

Q11) In four o'clock plants , the gene for flower colour (R) is incompletely dominant over the gene for white flower colour (r) , hence the plants heterozygous for flower colour (Rr) have pink flowers. What will be the ratio of offsprings in a cross between red flower and pink flower ? Show Answer

Q12) What will be the distribution of phenotypic features in the first filial generation after a between a homozygous female and a heterozyagous male for a single locus . Show Answer

Q13) what is the probability of production of dwarf offsprings in a cross between two heterozygous tall pea plants ? Show Answer

Q14) Inheritance of roan coat in cattle is an example of Show Answer

Q15) If both parents are carriers for thalassaemia , which is an autosomal recessive disorder , what are the chances of pregnancy resulting in an afffected child? Show Answer

Q16) An allele is said to be recessive , when it is expressed in Show Answer

Q17) The characters which appear in the first filial generation are called Show Answer

Q18) A tobacco plant heterozygous for a recessive character is self-pollinated and 1200 seeds are subsequently germinated . How many seedlings would have the parental genotype ? Show Answer

Q19) which of the following crosses will give tall and dwarf pea plants in same proportions ? Show Answer

Q20) which of the following is a test cross ? Show Answer

Q21) In mice , Y is the dominant allele for yellow fur and y is the recessive allele for grey fur . Since Y lethal when homozygous , the result of cross Yy x Yy will be Show Answer

Q22) In mice , back coat colour (allele B) is dominant to brown coat colour (allele b) . The offspring of a cross between a black mouse (BB) and a brown mouse (bb) were allowed to interbreed . What percentage of the progeny would have black coats ? Show Answer

Q23) Read the given statements and select the correct option .
Statement 1 : The law of segregation is one of the most important contributions to the biology.
Statement 2 : It introduced the concept of heredity factor factors as discrete physical entities which do not become blended . Show Answer

Q24) Mendel formulated the law of purity of gametes on the basis of Show Answer

Q25) In fruits , long wung is dominant to vestigial wing. When heterozygous long - winged flies were crossed with vestigial - winged flies, 192 offsprings were produced . Of these , 101 had long wings and 91 had vestigial wings .
If an exact Mendelian ratio had been obtained , then the number of each phenotype would have been Show Answer

Q26) What can be the blood group of offspring when both parents have AB blood group ? Show Answer

Q27) Phenotypic and genotypic ratio is similar in case of Show Answer

Q28) " When two pairs of traits are combined in a hybrid , segregation of one pair of characters is independent of the other pair of characters " . The statement explains which of the following laws\principles of Mendel? Show Answer

Q29) In Mendelian dihybrid cross , when heterozygous Round Yellow are self crossed , Round Green offsprings are represented by the genotype Show Answer

Q30) A man having the genotype EEFfGgHH can produce P number of genetically different sperms , and a woman of genotype IiLLMmNn can generate Q number of genetically different eggs . Determine the values of P and Q. Show Answer

Q31) How many types of gametes can be produced by a diploid organism who is heterozygous for 4 loci ? Show Answer

Q32) Law of independent assortment can be explained with the help of Show Answer

Q33) The percentage of ab gamete produced by AaBb parent will be Show Answer

Q34) What proportion of the offsprings obtained from cross AABBCC X AaBbCc will be completely heterozygous for all the genes segregated independently ? Show Answer

Q35) Mendel's law of independent assortment does not hold true for the genes that are located closely on Show Answer

Q36) Which of the following will result when plant YyRr is self - pollinated ? Show Answer

Q37) Which of the following is correct for the condition when plant YyRr is backcrossed with the double recessive parent ? Show Answer

Q38) Chromosomal theory of inheritance was given by Show Answer

Q39) Exprerimental verification of ' chromosomal theory of inheritance ' was done by Show Answer

Q40) Which three scientists independently rediscovered Mendel's work ? Show Answer

Q41) What is true about the crossing over between linked genes ? Show Answer

Q42) Chromosomes maps\ genetic maps were first prepared by Show Answer

Q43) depending upon the distance between any two genes which is inversely proportional to the strength of linkage , cross overs will very from Show Answer

Q44) Read the given statement and select the correct option .
Statement 1 : The physical distance between two genes determine both the strength of linkage and frequency of crossing over between two genes.
Statement 2 : One cross - over reduces the occurrence of another cross - over in its vicinity. Show Answer

Q45) The distance between the genes is measured by Show Answer

Q46) If linkage was known at the time of Mendel then which of the following laws, he would not been able to explain ? Show Answer

Q47) Which of the following is suitable for experiment on linkage ? Show Answer

Q48) XO type of sex determination and XY type of sex determination are the example of Show Answer

Q49) Grasshopper is an example of XO type of sex determination in which the males have Show Answer

Q50) In XO type of sex determination Show Answer

Q51) Which of the following is incorrect regarding ZW - ZZ type of sex determination ? Show Answer

Q52) A couple has six daughters . What is the possibility of their having a girl next time? Show Answer

Q53) Select the correct statements regarding honey bees.
(i) The queen bee and the worker bees develop from fertilized eggs and are sexually females .
(ii) Males (drones) develop parthenogenetically from unfertilized egg.
(iii) Queen bee feeds upon royal jelly and the worker bees feed upon bee bread. Show Answer

Q54) In honey bees , females are (i) having (ii) chromosomes and males are (iii) having (iv) chromosomes . Show Answer

Q55) Haplodiploidy is found in Show Answer

Q56) More than two alternate forms of a gene present on the same locus are called (i). they are produced due to repeated (ii) of the same gene but in different directions . Their well known example is (iii).
which of the following correctly fills the above statement Show Answer

Q57) Rate of mutation is affected by Show Answer

Q58) Select the incorrect statement regarding pedigree analysis. Show Answer

Q59) Two or more independent genes present on different chromosomes which determine nearly same phenotype are called Show Answer