biology 1111 labs
In DNA extraction lab, After you add the 20 mL of liquid soap and swirl the mixture gently, how long should you let the mixture sit?
10 minutes
1. If disjunction occurs in humans for sister chromatids of one chromosome during meisosi II, what chromosome number would each gamete have?
22,24,23,23
If a human gamete that is missing a chromosome participates in fertilization with a normal human gamete, how many chromosomes will the zygote have?
45
If a human gamete with an extra chromosome participates in fertilization with a normal human gamete, how many chromosomes will the zygote have?
47
Strawberries have how many copies of each of their seven chromosome in every cell and what is the name of it?
8/octoploid
At which phase of meiosis does the centromere split?
Anaphase 11
Every human has two types of sex chromosmomes
False
1. Which of the following is the correct order of processes used to isolate DNA?
Homogenization, Deproteinization, Precipitation
In DNA extraction lab, which of the following effect does the detergent in the experiment have?
Releases the DNA from the cells' nuclei; Causes the cells membranes to emulsify; Causes the cells membranes to breakdown
How is the centromere positioned on chromosome 14?
acrocentric
In DNA extraction lab, water should be what temperature?
cold
1. Room temperature rubbing alcohol can be used during precipitation. - false
false
Centriole pairs remain on the same side of the cell
false
Chromosomes consist of only DNA
false
Crossing over occurs in prophase II
false
DNA molecules have a net positive charge. Salt would be used in this experiment to "shield" these negative charges so the DNA would precipitate out of solution.
false
Each chromosome strand extending from the centromere is referred to as a leg.
false
Homologous chromosomes consist of two sister chromatids
false
Human liver cell have 22 pairs of chromsomes
false
If trisomy occurs at the 19 pair of chromosomes it will result in Down's Syndrome
false
Mitosis is divided in 7 phases interphase, prophase, prometaphase, metaphase, anaphase, and telophase, and cytokinesis
false
Replicated copies of each chromosome are called homologues and connected at the centromere
false
Salt is used in this experiment to help with chemical homogenization
false
The cell cycle is divided into 4 phases
false
The colder the ethanol was, the more soluble DNA was, making it easier to cause precipitation.
false
Which of the following choices is a haploid sex cell
gamete, sperm and egg
The process that will release the DNA from the nucleus of the cells is called
homogenization
In DNA extraction lab, The rubbing alcohol should be kept
ice cold
Which phase is NOT part of mitosis?
interphase
If a human gamete that is missing a chromosome participates in fertilization with a normal human gamete what condition results?
monosmy
Which term has the definition "a change in the nucleotide sequence of DNA, as well as being a source of genetic diversity
mutation
If nondisjunction occurs in humans for one pair of homologous chromosomes during meiosis I, will any normal gametes result?
no
Where is DNA located in the eukaryotic cells?
nucleous
In eukaryotes, the cell's genetic material, DNA, is confined to what part of the cell?
nucleus
what color is DNA
pinkish/white
In which of the following phases did the nuclear membrane start to dissolve?
prophase
Which of the following materials shields the negative phosphate end of DNA allowing the ends to come closer together and precipitate out?
salt
How should you pour the rubbing alcohol into the test tube?
slowly along the inside of the tube
How is the centromere positioned on chromosome 9
submetacentric
If a human gamete with a extra chromosome participates in fertilization with a normal human gamete what condition results?
trisomy
A kayotype is a visual ordered display of all the chromosomes from a body cell of an individual.
true
After DNA replication , the chromosome consists of two sister chromatids held together at the centromere
true
Before a cell proceeds from one phase of the cell cycle to the next, it must pass through checkpoints to determine if the cell is prepared to proceed into the next phase
true
If you have two identical alleles for a gene, you are considered to be homozygous for that trait
true
In DNA extraction lab, The colder the alcohol, the less soluble DNA is in it
true
Interphase is a preparatory phase that includes the GO, G1, S and G2 phases
true
Irregular chromosomal structure could cause a gamete to develop incorrectly
true
Meiosis results in four genetically unique gametes
true
Meiosis results in genetically unique sperm and eggs
true
Meiosis results in two daughter cells
true
Papain would be used to remove histone proteins during deproteinization
true
The DNA looked like cotton as it raised from the bottom layer.
true
The nuclear membrane is reformed in telophase
true
There are 22 pairs of autosomes for humans
true
If nondisjunction occurs in humans for sister chromatids of one chromosome during Meiosisi II will any normal gametes result?
yes