Top 150+ Solved Heredity and Variation MCQ Questions Answer
Q. Meiosis produce 4 daughter cells but each daughter cell differ from one another because of
a. Crossing over
b. Independent assortment
c. Change in chromosome number
d. Both A & B
e. cessive
Q. In T. H. Morgan"s Experiment on Drosophilia what will be the result when F1 female flies are crossed with double recessive male files ?
a. 83% parental combinations 17% Recombinations
b. 41.5 % parental combinations 58.5% recombinations
c. 60% parental combinations 40 % recombinations
d. 90 % parental combinations 10% Recombinations
e. cessive
Q. which cross yielded a ratio of 7:1 :1:7 ?
a. Test cross (Dihybrid) - Bateson and punnet
b. Test cross (Monohybrid) - Bateson and punnet
c. Test cross (Dihybri
d. - Carrel correns
e. cessive
Q. When there is no Possibility of independent assortment of genes during gametogenesis then What Will be the real ratio of F2 in dihybrd cross?
a. 9 : 3 : 3 : 1
b. 11 : 1 : 1 : 3
c. 12 : 1 : 1 : 2
d. 9 : 3 : 2 : 2
e. cessive
Q. What is incorrect statement Gynandromorphs ?
a. Individuals who show male characters and female characters
b. Individuals who show only female characters
c. It happens due to less of X- chromosomes
d. It happens due to binacleated eggs
e. cessive
Q. What is Barr body ?
a. One more than the number of X - chromosomes
b. One more than the number of Y-chromosomes
c. One less than the number of X - chromosomes
d. Two less than the number of X - chromosomes
e. cessive
Q. What is called Free martin ?
a. Sterile male born along with a fertile female
b. Sterile intersex born along with a fertile female
c. Sterile super male born along with a intersex
d. Sterile female born along with a fertile male
e. cessive
Q. Out of the following , Find out the reason for occurrence of free martin in cattles ?
a. Both the twins are connected by a common umbilical cord
b. Gonad of the male develop earlier then those of the female
c. Male hormones reach the female embryo and influence the development of male sex in the female embryo
d. All of the above
e. cessive
Q. In this group of plants male is heterogametic and female is homogametic type
a. Gymnosperms
b. Bryophytes
c. pteridophytes
d. angiosperms
e. cessive
Q. Name the Plant possessing two X chromosomes
a. Humulus japanic
b. Dioscoria sinulate
c. Flagellaria
d. Both (A) & (B)
e. cessive
Q. State the mutant gene Which converts the male flowers into female flowers In Maize plant
a. TA TA
b. ta ta
c. TA Ta
d. Both (A) &(C)
e. cessive
Q. By which gene sex is determind in Spinach ?
a. Single gene "m" located in the X- chromosome
b. Single gene "m" located in the Y- chromosome
c. Single gene "t" located in the X- chromosome
d. Single gene "t" located in the Y- chromosome
e. cessive
Q. Which factor in nature causes discontinuous Variation in a population ?
a. Recombination
b. Shufflng of parental genes
c. Mutation
d. Geneflow
e. cessive
Q. This is reversal of mutation
a. Spontneous mutation
b. Zygotic mutation
c. Back mutation
d. Recessive mutation
e. cessive
Q. Which condition among the following is lethal ?
a. (2n-2)
b. (2n +2)
c. (2n +1)
d. (2n- 1)
e. cessive