Principles of Inheritance and Variation MCQ | Principles of Inheritance and Variation NEET questions | Principles of Inheritance and Variation Class 12 important questions
Heredity and Variation: MCQs Quiz - 2
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Question 1 |
When the effects of both alleles are equally expressed in the heterozygote which one of the followings occurs?
Segregation | |
Codominance | |
Pleiotropy | |
Incomplete dominance |
Question 2 |
Point mutation involves
Deletion | |
Insertion | |
Change in single base pair | |
Duplication |
Question 3 |
Nondisjunction may occur due to the failure of ______ chromosomes to separate properly in meiosis I.
Defective | |
Heterozygous | |
Homologous | |
Autosomal |
Question 4 |
Rh factor can produce life-threatening disease ______.
Erythroblastosis fetalis | |
Turner’s Syndrome | |
AIDS | |
Sickle cell anemia |
Question 5 |
What is the composite display (paired and arranged according to size) of all the chromosomes of an organism called?
Linotype | |
Karyotype | |
Phenotype | |
Chromotype |
Question 6 |
Which one of the followings is caused by a recessive allele of a gene on chromosome 7?
Phenylketonuria (PKU) | |
Tay-Sachs disease | |
Cystic fibrosis (CF) | |
Huntington disease |
Question 7 |
ABO blood groups in humans are controlled by the gene l. It has three alleles – lA, lB and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?
Two | |
Three | |
One | |
Four |
Question 8 |
During meiosis I, the ______ chromosomes of each pair come together to lie side by side.
Homologous | |
Homozygous | |
Heterozygous | |
Linked |
Question 9 |
Which of the following pairs is correctly matched?
Sickle cell anemia - X chromosome | |
Down’s syndrome - 21st chromosome | |
Haemophilia - Y chromosome | |
Parkinson’s disease - X and Y chromosome |
Question 10 |
______ are heterozygous with regard to only one pair of alleles.
Testcrosses | |
Dihybrids | |
Monohybrids | |
None of these |
Question 11 |
Test cross is a cross between
Hybrid × Hybrid parent | |
Hybrid × Recessive parent | |
Hybrid × Dominant parent | |
Two distantly related species |
Question 12 |
The Genetic deficiency of ADH-receptor leads to
Diabetes Insipidus | |
Glycosuria | |
Diabetes mellitus | |
Nephrogenic Diabetes |
Question 13 |
Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage?
Color blindness – Y-linked | |
Klinefelter’s syndrome – 44 autosomes +XXY | |
Down syndrome – 44 autosomes + XO | |
Erythroblastosis fetalis – X-linked |
Question 14 |
Select the correct statement from the ones given below with respect to dihybrid cross
Tightly linked genes on the same chromosome show higher recombinations | |
Genes far apart on the same chromosome show very few recombinations | |
Tightly linked genes on the same chromosome show very few recombinations | |
Genes loosely linked on the same chromosome show similar recombinations as the tightly linked ones |
Question 15 |
Which one of the followings is not correct for Huntington disease ________?
Caused by a dominant allele | |
Marked by progressive nerve degeneration | |
Causes tumors and affects the liver as well | |
Affects the brain leading to mental disability and death |
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Its great to see that there are some of the additional questions apart from NCERT textbook… good for AIPMT and other PMTs
very helpful fr preparing NEET as it includes many application questions.