Step 4: Simulate the Cross in Step 3 Repeat step 2, except for two mice that are heterozygous for fur color and eye color (BbEe). If you simulate breeding using cards and sticks, both partners need to make cards and sticks that represent the alleles for a heterozygous mouse (BbEe). Don’t forget to simulate ten offspring. Step 5: (Optional) Combine Data from Step 5 with Classmates Student Guide
The Law of Independent Assortment is each member of a pair of homologous chromosomes separated by itself. From the first link: 3. Which Law, Segregation or Assortment, was most important in designing single-trait Punnett Squares? How is that rule demonstrated in setting up a Punnett Square? Law Of Segregation was most important in designing single-trait Punnett Squares.
Or each chromosome of a pair can be individually picked. 16. Explain two ways in which children can have different chromosomes (gene variation) than their mother or father. Random separation of chromosomes (law of segregation) when forming sperm/ova during anaphase I, crossing over of some genes to the homologous chromosomes during prophase I, and mutation during S
You will need 2 for this lab. 2. Using a pencil, draw a line one cm from the edge of one end of one strip of paper. 3. Make four pencil dots for each marker along this line, about 0.5 cm apart from each other.
a. GgWw b. GGWW c. ggWW d. GGww e. ggww Check your work. Answer is e. If the genotype of an individual is to be tested, the best cross to perform is the testcross, to a homozygous recessive. All of the other crosses will allow potential recessive alleles in the yellow round
You may spool the DNA on your glass rod or pipette tip. 10. Spool the DNA by dipping a pipette tip or glass right where the extract layer and alcohol are in contact with each other. With your tube at eye level, twirl the rod and watch as DNA strands collect. Data: | Amount Added or Obtained | Initial Color | Purpose | Buffer | 10 ml | blue | Break through the cell membrane | Strawberry | 1 | red | Subject tested
This study was performed to help teenagers in school learn about the make-up of DNA. DNA is the genetic material of any living organism and is found inside the cells of the organism. There are videos on the internet on how to do this. Also there are also chapters in science textbooks on how to do this. Some existing knowledge is that when all of the solutions are mixed together in the test tube they will separate into three layers one consisting of the strawberry puree (lysis solution), another is the DNA precipitate, and the last is the actual DNA.
GENETICS-1 1) Complex organisms produce sex cells that unite during fertilization, forming a single cell known as a) an embryo c) a gonad b) a gamete d) a zygote 2) A cell with a diploid chromosome number of 12 divided two times, producing four cells with six chromosomes each. The process that produced these four cells was most likely a) internal fertilization b) external fertilization c) mitotic cell division d) meiotic cell division 3) Which diagram represents a pair of homologous chromosomes? 4) In minks, the gene for brown fur (B) is dominant over the gene for silver fur (b). Which set of genotypes represents a cross that could produce offspring with silver fur from parents that both have brown fur? a) Bb x Bb c) BB x BB b) BB x bb d) Bb x bb 5) When a certain pure strain of fruit fly is cultured at a temperature of 16˚C, all of the flies will develop straight wings.
Writing Assignment 4 Name: Michael Tran FlyGene Unknown Code: 230 PS ID #:1109766 Lab Section: 16241 BIOL 3311 - Spring 2012 TA Instructor Name: Sneha Koneru Date: March 29, 2012 Materials and Methods In order to contain and cultivate Drosophila melanogaster flies, 25 x 95 mm polypropylene vials are used and are enclosed with foam stoppers. Provisions are made from a dehydrated cornmeal-based formula called 4-24 Blue and is prepared by combination with diluted water. The appropriate ratio of fly food is obtained by measuring half of the provided metal food cup with 4-24 Blue and mixing it with 7 ml of diluted water using a 15 ml conical test tube. Once complete, four granules of dry baker’s yeast are placed on the hydrated food as a nutritional supplement and to prevent the growth of bacteria. To manipulate the flies, they are anesthetized using CO2 that is administered through the FlowBuddyTM device with a 5 L/min flow rate.
Therefore, we had 36 data points for micrometer calibration. The caliper was calibrated in very similar way as micrometer. The six gage blocks caliper used were 0.105, 0.11, 0.16, 0.3, 0.5, 2 inch. Record all data in lab notebook. After the calibration, select one of unknown blocks in the shelf.