3) Chromosome s (Greek colored bodies) have two macromolecul ar components, one

Question

3) Chromosome s (Greek colored bodies) have two macromolecul ar components, one acidic and one basic. The basic component is: a. Histones b. DNA The cross-shaped structures observed between non-sister chromatids in meiosis 1 where recombination is occurring between the maternal and paternal chromosomes is called?: 4) In Avery's experiment with heat killed bacterial extract, which extract treated with the following enzymes resulted in rough bacteria that could not kill a mouse 5) a. b. c. d. e. The tube containing extract and RNAse The tube containing extract and Proteinase The tube containing extract and Yazanase The tube containing extract and DNAse The tube containing extract and no enzyme at all To generate the Santa Gertrudis breed at the King Ranch, the breeders bred what was considered two separate species of cattle: the Brahma bull (Bos indicus) with a shorthorn cow (Bos taurus). All offspring showed a shoulder hump. The simplest explanation is that the hump what kind of mutation: 6) A recessive, loss-of-function allele A dominant, gain-of-function allele a. b. If you mate a red eyed male Drosophila to a whited eyed virgin female, what color eyes do the male offspring have: 7) 50% red eyes; 50% white eyes 100% red eyes 25% red eyes,75% white eyes 25% white eyes; 75% red eyes 100% white eyes a, b, d, e,

Explanation / Answer

3. Histones are positively charged as they have lyseine and arginine in their structure whereas DNA is negatively charged due to the presence of phosphate.

4. The cross shaped structures are the chiasma which are the first symbol which shows the crossing over of genes.

5. The tube containing extract and DNAse do not kill the mouse because the R-strain is non-pathogenic and does not transforms to S-strain.

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