DNA Fingerprinting Lab Questions

Introduction

1. DNA is only the same in the case of identical twins.
2. They are used as evidence in crime investigations.

It Takes A Lickin

1.Somebody ate Jimmy's holographic lollipop.
2. Saliva was extracted from the scene.

Fingerprinting at the Nova Lab

1. Restriction enzymes cut DNA molecules like scissors, hacking at different parts.
2. It is a thick, gel-like substance that acts as a molecular strainer, allowing smaller pieces o flow through more easily.
3. Electrophoresis is the process of moving molecules with an electric current.
4. Easier
5. Placing the membrane over the gel makes it easier to work with.
6. Probes attach themselves to pieces of DNA along the membrane.
7. The probes produce radioactivity.
8. The DNA looks like a bar code. It is a mixture of thick strips and thin ones.
9. Honey licked the lollipop!!!!!

DNA Workshop site.

1.You can synthesize proteins and replicate DNA.

Paragraph on DNA Fingerprinting

A common way forensic investigators solve crimes is by using DNA fingerprinting. In this method, the culprit is identified by sets of numbers representing his/her the genes. It can be utilized in rape and other criminal cases, as well as paternity testing. Despite the 43.2% similarity in all human DNA sequences, separate code samples are still distinguishable. Some repetitive chunks of the genetic code, called variable number tandem repeats, are clearly different in every person. These are noted by investigators and then matched up in a database. The closest match to the dissected sample will be the culprit.

Online Mitosis Worksheet Answers

1. Which stage does the following occur:
Chromatin condenses into chromosomes: Prophase
Chromosomes align in center of cell. Metaphase
Longest part of the cell cycle. Anaphase
Nuclear envelope breaks down. Pro-metaphase
Cell is cleaved into two new daughter cells. Cytokinesis
Daughter chromosomes arrive at the poles. Telephase
Watch the video carefully.

2. The colored chromosomes represent chromatids. There are two of each color because one is an exact duplicate of the other.

--How many chromosomes are visible at the beginning of mitosis? There are 46 chromosomes at the beginning of mitosis.

-- How many are in each daughter cell at the end of mitosis? 46 are in each daughter cell at the end of mitosis.

--The little green T shaped things on the cell are: They are the centrioles

-- What happens to the centrioles during mitosis? There is one left on each new daughter cell.

3 . Identify the stages of these cells:

a. Metaphase
b. Telophase
c. Interphase

Prophase- In the prophase, the cell's chromosomes condense, its nucleolus disappears, the centrioles travel to the poles, and a web of spindle fiber forms.

Metaphase- During the metaphase, spindle fibers attach themselves to the chromosomes at the kinetochores, and then chromosomes separate into a line along the metaphase plate.

Telophase- Near the end of mitosis, the nuclear envelope materializes again, the chromosomes disperse around the cell, and the spindle fibers dissolve,

Interphase Prophase Metaphase Anaphase Telephase Total
20 10 3 2 1 36
56% 27% 8% 5% 3% 100%

Whitefish

View 1 View 2 View 3 View 4
Telophase Metaphase Prophase Anaphase

Onion

View 1 View 2 View 3 View 4 View 5
Metaphase Prophase Interphase Telophase Anaphase