Which of the following is a correct statement?

a. If you want to make a cDNA library, it doesn't matter which tissue you isolate the mRNA from.
b. If you want to make a genomic library, it doesn't matter which tissue you isolate the DNA from.
c. If you want to make a cDNA library, it doesn't matter which tissue you isolate the DNA from.
d. If you want to make a genomic library, it doesn't matter which tissue you isolate the mRNA from.

Option-B

Explanation:

The cDNA and genomic DNA are two types of DNA which are synthesized by humans in vectors for various purposes.

Complementary DNA is a DNA sequence obtained when the formed mRNA is reverse transcribed by the reverse transcriptase enzyme and results in the complementary DNA. The mRNA is derived from the specific cell in which the mRNA is expressed.

The genomic DNA is a type of DNA synthesized from the DNA of an organism. For this purpose, the DNA from any cell of the body can be extracted as the same genome is equally distributed in the organism.

Thus, Option-B is correct.

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

b is dominant over the allele for the white fur.