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A gene which is present on X-chromosome with no counterpart on Y-chromosome is called………
a) X-linked trait         
b) Y-linked trait
c) X-linked gene       
d) Y-liked gene

c

Explanation: for example eye colour in drosophila



A gene which is present on Y-chromosome with no counterpart on X-chromosome is called………
a) X-linked trait         
b) Y-linked trait
c) X-linked gene        
d) Y-liked gene

d

Explanation: for example SRY gene on Y-chromosomes for maleness in human



Trait controlled by genes located on autosomes is called……….
a) X-linked trait         
b) Y-linked trait
c) genetic trait           
d) recessive trait

c

Y-linked genes directly pass through Y-chromosome from……..to………
a) father to daughter
b) father to son
c) mother to daughter
d) mother to son

b

Explanation: son receives Y chromosome from father only while daughter has no Y-chromosome



X-linked genes directly pass through X-chromosome from……..to………
a) father to daughter
b) mother to son
c) mother to daughter
d) all of these

d

Explanation: daughter receives X chromosome from both father and mother and son receives X from only mother



X-linked genes CANNOT pass through X-chromosome from……..to………
a) father to daughter
b) mother to son
c) mother to daughter
d) father to son

d

Explanation: son receives X from mother, not from father



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