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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Heredity and Variation Set 3
Q1 | Match the following_ans_key_Column I Column II_ans_key_1. Single gene inheritance a. 1 : 1: 1 : 1_ans_key_2. Double gene inheritance b. 1 : 2 : 1_ans_key_3. Test cross c. 3 : 1_ans_key_4. Incomplete dominance d. 9 : 3 : 3 : 1
- (1 - c) (2 - d) (3 - a) (4 - b)
- (1 - d) (2 - c) (3 - b) (4 - a)
- (1 - a) (2 - b) (3 -
- (4 - c)
- cessive
Q2 | Match the following_ans_key_Column I Column II_ans_key_1. Co- dominance a. More then two optional forms of a gene_ans_key_2. Polygenic inheritance b. Multiple effect of a single gene_ans_key_3. Multiple alleles c. Quantitative inheritance_ans_key_4. Pleiotropism d. Both gene express their expression independently
- (1 - d) (2 - c) (3 - a) (4 - b)
- (1 - a) (2 -
- (3 - b) (4 -
- cessive
Q3 | What will be expected blood groups in the off spring when there is a cross between AB blood group mother and heterozygous B blood group father ?
- 25 % AB group 25 % A group 50 % B group
- 50 % AB group 25 % A group 25 % B group
- 25% AB group 50% O group 25 % A group
- 25 % O group 50 % B group 25 % A group
- cessive
Q4 | Which law of Mendel can be explained on chromosomal basis of inheritance ?
- Law of dominance
- Law of segregation
- Law of independent assortment
- All the above
- cessive
Q5 | The value of X/A is given in column A and sex of the fly is written in column B._ans_key_Match the following :-_ans_key_Column I Column II_ans_key_1. 1 (
- Normal Male_ans_key_2. 1.5
- super male Sterile_ans_key_3. 0.67
- inter sex_ans_key_4. 0.33
- super Female sterile_ans_key_5. 0.5 (e) Normal Female
- cessive
Q6 | Out of the marked portions X, Y and Z, in which region the male worm develop ?
- X
- Y
- Z
- All the three regions
- cessive
Q7 | Which kind of structural abnormality is seen in the above chromosome?
- Terminal deletion
- Duplication (Tandem)
- Duplication (Reverse)
- Inversion
- cessive
Q8 | Name the abnormality seen in chromosome number - 2
- Interstitial Deletion
- Terminal Deletion
- Tandem Duplication
- Reverse Duplicaton
- cessive
Q9 | What does the following pedigree chart represent ?
- Pedigree of sex - influenced disorder
- Pedigree of sex - linked disorder
- Pedigree of polydactylous in man
- Pedigree of gene mutation
- cessive
Q10 | What kind of chromosomal aberrations is seen in the given diagram?
- Deletion
- Duplication
- inversion
- Translocation
- cessive
Q11 | What kind of sex determination is seen in the given chart?
- Sex determination in drosophila
- Sex determination in honey bee
- Sex determination in moth
- Sex determination in butterfly
- cessive
Q12 | What do A, B, C represent in the given diagram?
- Centromere, chromatids chiasma
- Chromatid, chiasma, centromere
- Centromere, chiasma, chromatid
- Chromatid, chiasma centromere
- cessive
Q13 | What does the diagram represent ?
- synapsis Zygotene
- crossing over, Diplotene
- Tetrad, Pachytene
- Terminalization, Diakinesis
- cessive
Q14 | Whose karyotype is represented below ?
- Female Drosophila
- Male Drosophila
- Intersex Fly
- Super female fly
- cessive
Q15 | What does the above cross represent ?
- Incomplete linkage
- Complete linkage
- Crossing over
- Evolution
- cessive
Q16 | The genes Controlling the seven characters of a pea plant studied by Mendel are now known to be located on how many different chromosomes? AIPMT - 2003
- Seven
- Six
- Five
- Four
- cessive
Q17 | Which one of the following traits of garden pea studied by Mendel was a recessive feature? AIPMT - 2003
- Axial flower position
- Green Seed colour
- Green pod colour
- Round Seed shape
- cessive
Q18 | Down's Syndrome is caused by an extra copy of chromosome number 21. What percent age of off spring produced by an affected mother and a normal father? AIPMT - 2003
- 100%
- 75%
- 50%
- 25%
- cessive
Q19 | Lack of independent assortment of two genes A and B in fruitfly the Drosophilia is due to
- Repulsion
- Recombination
- Linkage
- Crossing over
- cessive
Q20 | . A male human is heterozygous for autosomal genes A and B and is also hemizygous for haemophilic gene h. What proportion of his sperms will be abh? AIPMT - 2004
- 08-Jan
- 1/32
- 16-Jan
- 04-Jan
- cessive
Q21 | . In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt. AIPMT - 2004
- 25% will be tall with red fruit
- 50% will be tall with red fruit
- 75% will be tall with red fruit
- All the offspring will be tall with red fruit.
- cessive
Q22 | A normal woman, whose father was colour blind is married with normal man. The sons would be AIPMT - 2004
- 75% Colour blind
- 50% colour blind
- all normal
- all colourblind
- cessive
Q23 | .The recessive genes located on X - chromosome of humans are alwaysAIPMT-2004
- Lethal
- Sub - Lethal
- expressed in males
- expressed in females
- cessive
Q24 | . Inorder to find out the different types of gametes produced by a pea plant having the genotype AaBb it should be crossed to a plant with the genotype AIPMT - 2004
- AABB
- AaBb
- aabb
- aaBB
- cessive
Q25 | . A woman with normal vision, but whose father was colourblind, marries a colourblind man. AIPMT - 2004 Suppose that the fourth child of this couple was a boy. This boy
- May be colourblind or may be of normal vision
- Must be colourblind
- Must have normal colour vision
- Will be partially colourblind since he is heterozygous for the colourblind mutant allele.
- cessive