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Concept of Dominance and Recessiveness

if hybrid DNA...

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if hybrid DNA is allowed to replicate for one generation in medium con†an ing N^{14 }and for second generation in medium con†an ing N^{15} then what is the proportion of light heavy and hybrid DNA obtained respectively

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Q. If a hybrid DNA (

N^{14} N^{15}

) is allowed to replicate thrice in a medium containing

N^{14}

, then what is the proportion of light, heavy and hybrid DNA obtained, respectively?

Q. DNA molecule having

N^{15}

isotope in both strands is cultured in

N^{14}

containing medium. After two generations how many DNA molecules are hybrid DNA?

^{15} N -^{15} N

) E.coli is allowed to replicate in (

^{14} N

) medium for 60 minutes. What would be the proportion of light (

^{14} N -^{14} N

) and hybrid density of DNA (

^{14} N -^{15} N

Q. Escherichia coli, in which both the strands of DNA are labeled with

^{15} N

is transferred to

^{14} N

medium and allowed to replicate for three generations. Find out the number of hybrid DNA molecules in the third generation

	Heavy Isotopic DNAs $(^{15} N H_{4})$	Light DNAs $(14 N H_{4})$	Hybrid DNAs $(^{15} N H_{4} + 14 N H_{4})$
I	2	0	6
II	0	6	2
III	2	4	2
IV	2	2	4

^{15} N H_{4}

labeled) is transferred to

^{1} 4 N H_{4} C l

medium and allowed to undergo replication by semi conservative method for three generations. After the completion of replication, the data is given in the table.
The correct combination is

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