You are sick in bed, at home. You\'re flipping aimlessly through the channels, t

ID: 168056 • Letter: Y

Question

You are sick in bed, at home. You're flipping aimlessly through the channels, trying to find something good on daytime television, and pause for a moment to see some chair-throwing drama in full swing on Maury. Evidently, the male guest on the show is having a lot of feelings about whether he is the father of the female guest's child. Even in your fever-induced state, you recall that certain kinds of genetic sequences are better for paternity testing than others. What kinds of sequences are these? conserved genes that code for proteins, and have slow mutation rates non-coding nuclear DNA, like some Y-chromosome genes, with somewhat slow mutation rates mtDNA sequences, with somewhat high mutation rates non-coding tandem repeats, like SNTRs and VNTRs, with high mutation rates You are interested in isolating a particular gene for analysis. How do you cut out your gene from the rest of the DNA around it that you don't care about analyzing? Do the polymerase chain reaction. Do gel elecrophoresis. Use a restriction enzyme. Ask nicely. A population of ring-tailed lemurs has a bunch of offspring. Some of the lemurs have "good traits" that help them to stay alive in the environment and reproduce, possibly passing on their good traits to the next generation of lemurs. What force of evolution is this? Genetic drift Gene flow Natural selection None of these are correct, but I think ring-tailed lemurs are really cute! You are looking at some variables, or traits that have a range of values, that you are studying. You have calculated the mean and want to see how much the data disperse around the mean. You do this, and then take the squareroot of that value. What is the name of the statistic you have just calculated? Population size Variance Standard deviation Average One defining characteristic of this stage is that all of the chromosomes stick to the spindle fibers and line up along the equator of the cell. What is the name of this stage? interphase prophase metaphase

Explanation / Answer

Question No. 23:

In Metaphase, all of the chromosomes stick to the spindle fibers and line up along the equator of the cell.

S.No.

Cell Cycle Phase

Process

Interphase - S

DNA replication occurs

Interphase - G1

Cell grow and function normally

Interphase - G2

Cell functions normally and prepare to divide

Does not proceed through G1 checkpoint

Prophase

Chromosomes start to condense

Prometaphase

Kinetochores attach to spindle fibers

Metaphase

Chromosomes align in center of cell

Anaphase

Sister chromatids separate

Telophase

Nucleus reforms, chromosomes decondense

Cytokinesis

Cell divides into 2 daughter cells

Note: As per the guidelines we can answer only one question. So, I did not answer the remaining questions. Hope you can understand.