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