A colourblind man marry with a daughter of colourblind father, the generation will be 

(1) there will be no daughter colourblind

(2) all sons will be colourblind

(3) all daughter will be colourblind

(4) half sons will be colourblind

Subtopic:  Sex Linked Recessive Inheritance |
 68%
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In a plant, red fruit (R) 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. Then

(1) 25% will be tall with red fruit

(2) 50% will be tall with red fruit

(3) 75% will be tall with red fruit

(4) All of the offspring will be tall with red fruits 

Subtopic:  Dihybrid Cross Analysis |
 64%
From NCERT
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A man whose father is a colourblind, marry a woman, who is a daughter of colourblind mother. The offspring of this couple will be

(1) all daugher and sons are colourblind

(2) 50% colourblind and 50% normal son

(3) carrier normal daugher and colourblind sons

(4) colourblind sons and normal daughter

 

Subtopic:  Sex Linked Inheritance: Characteristics |
 74%
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A pea plant parent having violet-coloured flowers with unknown genotype was crossed with a plant having white-coloured flowers. In the progeny, 50% were white. The genotypic constitution of the parent having violet-coloured flowers was

1. homozygous

2. merozygous

3. heterozygous

4. hemizygous

Subtopic:  Monohybrid Cross: 1 |
 86%
From NCERT
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The number of linkage group(s) present in Escherichia coli is 

(1) One

(2) two

(3) four

(4) seven

Subtopic:  Understanding Linkage |
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In two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, 75% of the flowers are red and 25% are white. The genotypic constitution of the parents having red coloured flowers will be 

(1) both homozygous

(2) one homozygous and other heterozygous

(3) both heterozygous

(4) both hemizygous

Subtopic:  Monohybrid Cross: 1 |
 58%
From NCERT
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Genotypic and phenotypic ratios 1 : 2 : 1 in the offsprings explain the principle of 

(1) dominance

(2) blending inheritance

(3) recessiveness 

(4) All of the above

Subtopic:  Dominance Deviation from Mendel: 1 |
 58%
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Sickle cell anaemia is example of 

(1) sex-linked inheritance

(2) deficiency disease

(3) autosomal heritable disease

(4) infectious disease

Subtopic:  Mendelian Disorders: Sickle Cell Anemia |
 81%
From NCERT
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Holandric genes are located 

(1) both in X and Y-chormosome

(2) only in Y-chromosome

(3) only in X-chromosome

(4) only in autosomes

 

Subtopic:  Sex Linked Inheritance: Introduction |
 74%
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Which one of the following disorders and characteristic is correctly matched?

(1) Cystic fibrosis - Produciton of thick mucous that cloge airways

(2) Sickle cell anaemia - Brain deterioration beginning at months of age

(3) Achondroplasia - Extra fingers or toes

(4) Huntingon's disease - Skeletal, eye and cardiovascular defects

Subtopic:  Mendelian Disorders |
 56%
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