Question

20. A corn plant is homozygous for a mutant allele that results in no pigment in the seed (i.e.,
white). The mutant is caused by Ds insertion that often exits late in seed development, when
there is an active Ac element in the genome. If there is NO active Ac element, the seeds of
this plant will be:
A) no pigment (i.e., white)
B) pigmented all over
C) white with small spots of pigment
D) white with large spots of pigment
E) weakly pigmented

21. Oncogenes are genes that:
A) Are expressed and activated in cancer cells
B) Gain-of-function mutations that promote cancer
C) Dominant mutations only need to be present in one allele to promote cancer
D) Positively control the cell cycle
E) All of the above

22. The INTERACTOME is defined as:
A) the sequence and expression patterns of all transcripts patterns of all transcripts
B) the sequence and expression of all proteins
C) the complete set of physicalteractions (i.e., protein/DNA or protein/protein)
D) the complete set of all metabolites
E) none of the above

20. A corn plant is homozygous for a mutant allele that results in no pigment in the seed (i... white). The mutant is caused by Ds insertion that often exits late in seed development, when there is an active Ac element in the genome. If there is NO active Ac element, the seeds of this plant will be: A) no pigment (i.e., white) B) pigmented all over C) white with small spots of pigment D) white with large spots of pigment E) weakly pigmented 21. Oncogenes are genes that: A) Are expressed and activated in cancer cells B) Gain-of-function mutations that promote cancer C) Dominant mutations only need to be present in one allele to promote cancer D) Positively control the cell cycle E) All of the above 22. The INTERACTOME is defined as: A) the sequence and expression patterns of all transcripts patterns of all transcripts B) the sequence and expression of all proteins C) the complete set of physicalteractions (i.e., protein/DNA or protein/protein) D) the complete set of all metabolites E) none of the above

Answer 1

20. Let allele Ww denote the color of seed (white/non white) and allele Pp denote the pigment( large/small), now performing cross between these two alleles with the said characters followed by the selfing in F₁ generation we get

Now the plant is homozygous for mutant allele that results in no pigment i.e white colored, therefore genotypes containing both WW alleles will have no pigment due to the presence of Ds, so from the above cross it is evident that the seeds of the plant will be white with large spots pigment.

e goneration ww X Pp. (colour of seed) (Pigment Large /sonale) f, generation Ww Pp x Wwpp (Selting) WwPp wwpp Wapp wwPP | WwPp (WP WWPP Waff | WWPp (WP WWPP Wife wWpp W WWPP werPp Wwwpp wapp wapp wapp w

21. Oncogenes are those genes that are responsible for cancer. They are expressed and activated in cancer cells from proto-oncogenes. These genes promote mutation in normal cells causing rapid cell division to cause cancer. The proto-oncogenes positively control the cell cycle and when mutated to form oncogenes they took over that function. Dominant mutations present in any one of the allele is sufficient to cause cancer. So all the above statements are correct.

22. The Interactome is defined as the set of molecular interactions taking place in a cell. It refers to physical interactions between a protein and DNA or between two proteins or may be between two genes. So option (C) is correct.