Solve online MCQs (Multiple Choice Questions) on Heredity and Variation with answers and test reporting. Test No. 2
Heredity and Variation: MCQs Quiz - 2
Congratulations - you have completed Heredity and Variation: MCQs Quiz - 2. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%
Your answers are highlighted below.
When the effects of both alleles are equally expressed in the heterozygote which one of the followings occurs?
Point mutation involves
Change in single base pair
Nondisjunction may occur due to the failure of ______ chromosomes to separate properly in meiosis I.
Rh factor can produce life-threatening disease ______.
Sickle cell anemia
What is the composite display (paired and arranged according to size) of all the chromosomes of an organism called?
Which one of the followings is caused by a recessive allele of a gene on chromosome 7?
Cystic fibrosis (CF)
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?
During meiosis I, the ______ chromosomes of each pair come together to lie side by side.
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
______ are heterozygous with regard to only one pair of alleles.
None of these
Test cross is a cross between
Hybrid × Hybrid parent
Hybrid × Recessive parent
Hybrid × Dominant parent
Two distantly related species
The Genetic deficiency of ADH-receptor leads to
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
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
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
Once you are finished, click the button below. Any items you have not completed will be marked incorrect.
There are 15 questions to complete.