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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Heredity and Variation Set 2
Q1 | ) First generation after a cross is
- First filial generation
- F1 gneratioon
- Second filial generation
- Both (A) and (B)
- cessive
Q2 | ) In humans , height shows a lot of variation . It is an example of
- Multiple alleles
- Pleiotropic inheritance
- polygenic inheritance
- False allelic inheritance
- cessive
Q3 | Meiosis produce 4 daughter cells but each daughter cell differ from one another because of
- Crossing over
- Independent assortment
- Change in chromosome number
- Both A & B
- cessive
Q4 | In T. H. Morgan"s Experiment on Drosophilia what will be the result when F1 female flies are crossed with double recessive male files ?
- 83% parental combinations 17% Recombinations
- 41.5 % parental combinations 58.5% recombinations
- 60% parental combinations 40 % recombinations
- 90 % parental combinations 10% Recombinations
- cessive
Q5 | which cross yielded a ratio of 7:1 :1:7 ?
- Test cross (Dihybrid) - Bateson and punnet
- Test cross (Monohybrid) - Bateson and punnet
- Test cross (Dihybri
- #NAME?
- cessive
Q6 | When there is no Possibility of independent assortment of genes during gametogenesis then What Will be the real ratio of F2 in dihybrd cross?
- 9 : 3 : 3 : 1
- 11 : 1 : 1 : 3
- 12 : 1 : 1 : 2
- 9 : 3 : 2 : 2
- cessive
Q7 | What is incorrect statement Gynandromorphs ?
- Individuals who show male characters and female characters
- Individuals who show only female characters
- It happens due to less of X- chromosomes
- It happens due to binacleated eggs
- cessive
Q8 | What is Barr body ?
- One more than the number of X - chromosomes
- One more than the number of Y-chromosomes
- One less than the number of X - chromosomes
- Two less than the number of X - chromosomes
- cessive
Q9 | What is called Free martin ?
- Sterile male born along with a fertile female
- Sterile intersex born along with a fertile female
- Sterile super male born along with a intersex
- Sterile female born along with a fertile male
- cessive
Q10 | Out of the following , Find out the reason for occurrence of free martin in cattles ?
- Both the twins are connected by a common umbilical cord
- Gonad of the male develop earlier then those of the female
- Male hormones reach the female embryo and influence the development of male sex in the female embryo
- All of the above
- cessive
Q11 | In this group of plants male is heterogametic and female is homogametic type
- Gymnosperms
- Bryophytes
- pteridophytes
- angiosperms
- cessive
Q12 | Name the Plant possessing two X chromosomes
- Humulus japanic
- Dioscoria sinulate
- Flagellaria
- Both (A) & (B)
- cessive
Q13 | State the mutant gene Which converts the male flowers into female flowers In Maize plant
- TA TA
- ta ta
- TA Ta
- Both (A) &(C)
- cessive
Q14 | By which gene sex is determind in Spinach ?
- Single gene "m" located in the X- chromosome
- Single gene "m" located in the Y- chromosome
- Single gene "t" located in the X- chromosome
- Single gene "t" located in the Y- chromosome
- cessive
Q15 | Which factor in nature causes discontinuous Variation in a population ?
- Recombination
- Shufflng of parental genes
- Mutation
- Geneflow
- cessive
Q16 | This is reversal of mutation
- Spontneous mutation
- Zygotic mutation
- Back mutation
- Recessive mutation
- cessive
Q17 | Which condition among the following is lethal ?
- (2n-2)
- (2n +2)
- (2n +1)
- (2n- 1)
- cessive
Q18 | State the cause of Philadelphia syndrome
- Deletion from the long arm of chromosome number 20
- Duplication in long arm of chromosome number 20
- Deletion from the long arm of chromosome number 22
- Deletion from the short arm of chromosome number 22
- cessive
Q19 | which statement is incorrect regarding gene mutation
- Mutations may be gradual or they may not be induced.
- Mutation is an evolutionary agent
- Any gene can undergo mutation
- Mutated gene is harmful to the individual
- cessive
Q20 | What happens to excessive phenylalanine accumulation in the blood of phenylketonuria patient ?
- Get deposited on synovial membrane
- excreted in urine
- Get deposited in storage organs
- All of the above
- cessive
Q21 | Name the enzyme needed for the following biochemical reaction Tyrosine ???? enzyme Melanin
- Melanase
- tyrosinase
- Tyrosine aminase
- transaminase
- cessive
Q22 | Which is very common method to study Human Karyotype ?
- Blood culture method
- Tissue culture method
- Pedigree method
- Statistical method
- cessive
Q23 | Name the disorder caused by trisomy of sex chromosomes.
- Down’s syndrome
- Kline felter’s syndrome
- Turner’s syndrome
- Edward’s syndrome
- cessive
Q24 | Match the following :-_ans_key_Column I Column II_ans_key_1. Genetics a. Father of genetics_ans_key_2. W.Bateson b. To become_ans_key_3. "Gen" c. Coined the term genetics_ans_key_4. Gregor Johann Mendel d. Study of heredity
- (1 - d) (2 - c) (3 - a) (4 - b)
- (1 - d) (2 - a) (3 - c) (4 - b)
- (1 -
- (2 - C) (3 - b) (4 - a)
- cessive
Q25 | Match the following_ans_key_Column I Column II_ans_key_1. Johansen a. Coined the term gene_ans_key_2. Mendel b. Crossing over in drosophila_ans_key_3. T. H. Morgan c. Linkage in lathyrus odoratus_ans_key_4. Bateson & punnett d. Law of segregation
- (1 - d) (2 - c) (3 -
- (4 - a) (B) (1 - a) (2 - d) (3 - b) (4 - c)
- (1 - c) (2 -
- (3 - b) (4 - a) (D) (1 - b) (2 - d) (3 - a) (4 - c)
- cessive