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Q. No.Which of the following conditions is not a case of aneuploidy?
1. Down’s syndrome
2. Turner’s syndrome
3. Thalassemia
4. Klinefelter’s syndrome
Subtopic: Mendelian Disorders: Thalassemia | Non - Disjunction & Aneuploidy | Sex Aneuploidy - Turner & Klinefelter Syndrome |
90%
From NCERT
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A man has type AB blood and he marries a woman with type O blood. Two children are born to the couple and they also adopted one child. If child 1 has type A blood, child 2 has type B blood, and child 3 has type O blood, which child was adopted?
| 1. | Child 1 | 2. | Child 2 |
| 3. | Child 3 | 4. | Cannot be determined |
Subtopic: Monohybrid Cross: Further Understanding |
90%
From NCERT
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The number of chromosomes in the male and female is/are not equal in:
I: Humans
II: Honeybees
III: Grasshoppers
IV: Drosophila
1. Only II
2. Only I and IV
3. Only II and III
4. I, II, III and IV
I: Humans
II: Honeybees
III: Grasshoppers
IV: Drosophila
1. Only II
2. Only I and IV
3. Only II and III
4. I, II, III and IV
Subtopic: Sex Determination |
71%
From NCERT
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For a female becoming haemophilic:
I: mother of such a female has to be at least a carrier.
II: father of such a female has to be at least a carrier.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
I: mother of such a female has to be at least a carrier.
II: father of such a female has to be at least a carrier.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Mendelian Disorders: Hemophilia |
70%
From NCERT
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In Pisum sativum, the allele for tallness [T] is completely dominant over the allele for dwarfness [t]. What proportion of the tall progeny of the cross Tt X Tt will be homozygous tall?
1. 1/3
2. 1/4
3. 1/2
4. 3/2
1. 1/3
2. 1/4
3. 1/2
4. 3/2
Subtopic: Monohybrid Cross: 1 |
From NCERT
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A pea plant shows the dominant phenotype. You conduct a single gene test cross to determine the genotype of this pea plant (T = tall, t = short). All progeny of the test cross show the dominant phenotype. The genotype of the plant in question is most likely:
1. TT.
2. TTtt.
3. Tt.
4. tt.
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
75%
From NCERT
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes:
| Column I | Column II | ||
| A | Number of possible phenotypes in ABO blood group system | P | 1 : 2 : 1 |
| B | Number of possible genotypes in ABO blood group system | Q | 3 : 1 |
| C | F2 phenotypic ratio in incomplete dominance | R | 4 |
| D | F2 phenotypic ratio in complete dominance | S | 6 |
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | R | S | P |
| 3. | R | S | P | Q |
| 4. | S | P | Q | R |
Subtopic: Monohybrid Cross: 1 | Dominance Deviation from Mendel: 1 | Dominance Deviation from Mendel: 2 |
90%
From NCERT
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If two genes are closely linked on the same chromosome:
| 1. | they will assort independently |
| 2. | the proportion of recombinants formed will be higher than the parental types |
| 3. | the proportion of recombinants formed will be much lower than the parental types |
| 4. | the proportion of recombinants formed will be equal to that of the parental types |
Subtopic: Linkage Types | Recombination & Gene Mapping |
85%
From NCERT
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The trait, shown by solid symbols in the given pedigree, is MOST LIKELY inherited as:
1. Autosomal recessive trait
2. Sex linked recessive trait
3. Autosomal dominant trait
4. Sex linked dominant trait
1. Autosomal recessive trait
2. Sex linked recessive trait
3. Autosomal dominant trait
4. Sex linked dominant trait
Subtopic: Pedigree Analysis: Basics | Pedigree Analysis: Problem Solving |
52%
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Antirrhinum majus with pink flowers is crossed with Antirrhinum majus with white flowers. What is the expected phenotypic ratio in the progeny?
1. 1 [red] : 2 [pink] : 1 white
2. 3 [red] : 1 [white]
3. 1 [pink] : 1 [white]
4. 3 [pink] : 1 [white]
1. 1 [red] : 2 [pink] : 1 white
2. 3 [red] : 1 [white]
3. 1 [pink] : 1 [white]
4. 3 [pink] : 1 [white]
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
58%
From NCERT
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