MDCAT Biology Chapter 8 Evolution Online Test With Answers

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MDCAT Biology Chapter 8 Evolution Online Test

Sr. # Questions Answers Choice
1 When a haemophilic carrier woman marries a normal man, who among her offspring may be affected all her children all her daughter half of her daughter half of her sons
2 Which of these traits zigzags from meternal grand father through a carrier daughter to a grandson ? autosomal X-linked Y-linked X and Y linked
3 Which of the following traits is not sex-linked recessive ? haemophilia colour blindness hypophosphatemic ricket tfm syndrome
4 Which phenomenon reduces the chances of genetic recombination and variations among offspring ? linkage crossing over independent assortment dominance
5 Which of the following traist is transmitted directly from an affected to only its sons? autosomal X-linked Y-linked X and Y linked
6 Who for the first time found white eye mutant in drosophila ? Morgan Bridges Correns De Varies
7 How may gene pairs contribute to the wheat grain colour? one two three four
8 A heterrozygote offspring quantitatively exceeds the phenotypic expression of both the homozygote parents due to: dominance incomplete dominance over dominance codominance
9 What happens when both alleles of a gene pair independently express in a heterozygote? dominance incomplete dominance over dominance codominance
10 When a single gene has multiple phenotypic effects, the phenomenon is called: condominance epistasis pleiotropy sex-linkage
11 What is the 5th amino acid in sickle cell beta chain Histidine Proline Leucine Valine
12 In sickle cell beta chain glutamic acid is replaced by valine which is sixth amino acid from N-Terminal C-Terminal R-Terminal H-Terminal
13 Genes for alpha and beta chains of hemoglobin are found on which chromosomes? Chromosome 16 alpha; chromosome 11 beta Chromosome 11 alpha; chromosome 16 beta Chromosome 11 Chromosome 16
14 Sickle cell mutation affects One beta chain Both beta chains Only alpha chain None of the alpha or beta chain
15 Mutation may be caused by Chemicals Radiations Mutagens All of these
16 Mutation of one or two N-bases is Inversion Point mutation Deletion Chromosomal aberrations
17 Which enzyme deficiency leads to phenylketonuria Phenylalanine oxidase Phenylalanine hydroxylase Phenylalanine synthase Phenylalanine carboxylase
18 Point mutation occurs in Sickle cell anemia Phenylketonuria Alkaptonuria All
19 Homogenetistic acid is oxidized rapidly when exposed to air, turning the urine White Purple Blue Black
20 A change in one or more bases of DNA, which results in the formation of an abnormal protein is Moulting Transformation Mutation Fission
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