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Earn 100

Albinism is a congenital disorder (non synthesis of melanin) resulting from the lack of the enzyme
(a)Catalase
(b)Fructokinase
(c)Tyrosinase
(d)Xanthine oxidase

50% studentsanswered this correctly

Important Questions on Principles of Inheritance and Variation
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Sometimes chromosome number increase or decrease due to

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Match the following
List-I | List-II | ||
(A) | XX - XO, method of sex determination | (I) | Heterogametic |
(B) | 1.5X/A ratio | (II) | Turner's syndrome |
(C) | Karyotype 45 | (III) | Hemiptera |
(D) | ZW - ZZ method of sex determination | (IV) | Metafemale |
The correct match is

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The idea of mutations was brought forth by

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Edward syndrome is on account of .....

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Sickle- cell anaemia is an autosome linked recessive trait that can be transmitted from parents to the offspring when both the partners are carrier for all the gene (or heterozygous). The disease is controlled by a single pair of allele, . Out of the three possible genotypes only homozygous individuals for are lethal. Select the right option in which and are correctly identified

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Pick out the correct statements
(i) Haemophilia is a sex-linked recessive disease
(ii) Down's syndrome is due to aneuploidy
(iii) Phenylketonuria is an autosomal dominant gene disorder
(iv) Phenylketonuria is an autosomal recessive gene disorder
(v) Sickle-cell anaemia is an X-linked recessive gene disorder

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Match column I with column II and find the correct answer
Column I | Column II | ||
(A) | Monoploidy | ||
(B) | Monosomy | ||
(C) | Nullisomy | ||
(D) | Trisomy | ||
(E) | Tetrasomy | ||

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Height is
