genetics multiple choice answer check 20, which of the following is Barbara McCl

Question

genetics multiple choice answer check

20, which of the following is Barbara McClintock's jumping gene, Class II transposon from Zea mays? A. Ty B. Ac/Ds Alu E. P element 21. Which experimental technique for assessing genetic variation involves the use of restriction enzymes? DNA sequencing B. protein electrophoresis C. RFLP analysis PCR E. phenotypic determination 22. In DNA sequencing, what causes the 24. Which of the following does NOT support the Endosymbiont Theory? A. Mitochondria and chloroplasts have ribosomes more similar to bacterial ribosomes in size and susceptibility to antibiotics. B. Eukaryotes and prokaryotes share a common ancestor because they both contain organelles like nuclei, mitochondria and chloroplasts C, Mitochondrial and chloroplastic DNA contain genes similar to a- proteobacteria and cyanobacteria, respectively D. Mitochondria and chloroplasts are about the same size as bacteria, and they possess their own DNA like bacteria. E. Examples of eukaryotic cells that are hosts to endosymbiotic bacteria exist today

Explanation / Answer

20.Ans:

Transposons are also called jumping genes or mobile genetic elements. Barbara Mcclintock discovered transposable elements are Ac an Ds.

So the answer is B. Ac/Ds

21Ans:

DNA sequencing is the process of determining the order of nucleotides within a DNA molecule, it is used to assessing genetic variation involves the use of restriction enzymes.

So the answer is A.DNA sequencing

22.Ans:

Dideoxynucleotides are chain elongationg inhibitors of DNA polymerase in condensation reaction, it can lead to termination of DNA sequence.

So the answer is B. Dideoxynucleotides

23.Ans:

In a monohybrid cross if two heterozygous individuals mate, it produce offsprings genotypic ratio is 1:2:1.In this one dominant and one recessive, so the probability of heterozygous offspring 50%.

So the answer is C.1/2

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