Which one of the following is a wrong statement regarding mutations?
Options
(a) Deletion and insertion of base pairs cause frame-shift mutations (b) Cancer cells commonly show chromosomal aberrations (c) UV and Gamma […]
Which one of the following conditions correctly discribes the manner of determining the sex in the given example?
Options
(a) Homozygous sex chromosomes (ZZ) determine female sex in birds (b) XO type of […]
Which one of the following condition in humans, is correctly matched with its chromosomal abnormality / linkage?
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(a) Klinefelters syndrome-44 autosomes a XXY (b) Colour blindness-Y-linked (c) Erythroblastosis foetalis-X-linked (d) Down syndrome-44 autosomes […]
Which of the following statements is not true of two genes that show 50% recombination frequency?
Options
(a) The genes are tightly linked (b) The genes show independent assortment (c) IF the genes […]
If two persons with ‘AB’ blood group marry and have sufficiently large number of children these children could ve classified as ‘A’ blood gorup: ‘AB’ blood group: ‘B’ blood group in 1 : 2 : […]
A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?
Options
(a) Blood […]
When two unrelated individuals or lines are crossed, the performance of F hybrid is often superior to both parents. This phenomenon is called
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(a) heterosis (b) transformation (c) splicing (d) metamorphosis
Correct […]
The genetic defect-Adenosine deaminase (ADA) deficiency may be cured permanently by:
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(a) administering adenosine deaminase activators (b) introducing bone marrow cells producing ADA into cells at early embryonic stages (c) enzyme replacement […]
Select the correct statement from the ones give below with respect to dihybrid cross.
Options
(a) Tightly linked genes one the same chromosome show higher recombinations (b) Genes far apart on the same […]
Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized, the F₂ segregation will show
Options
(a) segregation in […]
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