Everyday Science · Cell Biology & Microorganisms · page 6 of 36
DNA, Genes & Genetics MCQs with Answers
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- 51.
Diagnosis of a genetic condition before the appearance of symptoms is ?
- 52.
What is the study of altering humans by changing their genes called?
- 53.
In human beings, there are 23 pairs of chromosomes. Down's syndrome disorder is concerned with chromosome number _?
- 54.
Which one is a start codon?
- 55.
The total of all alleles in a population is called _?
- 56.
The total number of chromosomes in a somatic (body) cell of a human is _?
- 57.
Crossing over involves exchange of genetic material between ?
- 58.
What is the composition of a nucleoside?
- 59.
The organisms whose genes are modified are called ?
- 60.
An analysis of chromosomes in a big city revealed the presence of four types of rather rare human beings whose sex chromosome compositions are mentioned in List-I. They are phenotypically either male (M) or female (F) as recorded in List-II. Match List-I (Chromosome composition) with List-II (Sex) and select the correct phenotypic sex using the codes given below the lists. List-I: A. XO B. XXXY C. XYY D. XXY List-II: 1. Male (M) 2. Female (F) Codes: A, B, C, D