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Q. No.1 : 2 : 1 phenotypic and genotypic ratio is found in
1. complementary genes
2. incomplete dominance
3. multiple alleles
4. pseudo alleles
Subtopic: Monohybrid Cross: 1 |
74%
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A group of geneticists are trying to figure out the dominance hierarchy for a newly discovered plant. They have found that when a truebreeding red plant is crossed with a truebreeding blue plant, the resulting offspring are purple. What is the most likely explanation for this result?
1. Red is the dominant allele
2. Blue is the dominant allele
3. Incomplete dominance
4. Codominance
1. Red is the dominant allele
2. Blue is the dominant allele
3. Incomplete dominance
4. Codominance
Subtopic: Monohybrid Cross: 1 |
80%
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Which of the following crosses can never result in a recessive phenotype?
1. Tt Pp X Tt Pp
2. tt pp X TT PP
3. tt pp X Tt Pp
4. TT Pp X tt pp
1. Tt Pp X Tt Pp
2. tt pp X TT PP
3. tt pp X Tt Pp
4. TT Pp X tt pp
Subtopic: Dihybrid Cross Analysis |
65%
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When a black rabbit and a lilac rabbit are crossed, all of the offspring have black and lilac spots. What type of genetic inheritance is represented here?
1. Incomplete dominance
2. Codominance
3. Polygenic inheritance
4. Pleiotropy
Subtopic: Monohybrid Cross: 1 |
71%
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Which one of the following is pure breeding for only one character?
1. HhRr
2. HHRr
3. HHRR
4. hhrr
1. HhRr
2. HHRr
3. HHRR
4. hhrr
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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Incontinentia pigmenti is a rare X‐linked dominant disorder that affects the skin, hair, teeth, nails and central nervous system. If the offspring of a certain cross has a 50% chance of receiving the disease, regardless of gender, which of the following statements is true?
1. The father has the disease.
2. The mother does not have the disease.
3. The mother is homozygous for the disease.
4. The mother is heterozygous for the disease.
1. The father has the disease.
2. The mother does not have the disease.
3. The mother is homozygous for the disease.
4. The mother is heterozygous for the disease.
Subtopic: Mendelian Disorders |
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Which of the following is CORRECT statement?
| 1. | Pleiotropic genes exhibit single phenotype. |
| 2. | Pleiotropy is caused by a gene that has multiple phenotypic effects. |
| 3. | Sickle cell anaemia is an example of multifactorial inheritance. |
| 4. | Lethal genes causes the appearance of ancestral characters. |
Subtopic: Polygenic Inheritance & Pleiotropy |
81%
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Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
76%
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X-linked recessive gene is
1. always expressed in male
2. always expressed in female
3. lethal
4. sub lethal
1. always expressed in male
2. always expressed in female
3. lethal
4. sub lethal
Subtopic: Mendelian Disorders |
69%
From NCERT
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A man of ‘A’ blood group marries a woman of ‘AB’ blood group. Which type of progeny would indicate that man is heterozygous?
1. O
2. B
3. A
4. AB
1. O
2. B
3. A
4. AB
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
79%
From NCERT
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