top-rated free essay

Punnet Square Lab

By nicoles2012 Aug 12, 2012 393 Words
SCI115 Introduction to Biology
Punnett Squares Virtual lab (Week 5)
Go to the following website for completion: Upon completion of the Punnett Squares Virtual Lab, please answer the following questions thoroughly using complete sentences and proper grammar and spelling.

1.For one of the monohybrid crosses you performed in this Investigation, describe how to use the phenotype ratios to determine the percentage of offspring displaying each trait. Well for one once you have the phenotypes all done on your Punnet Square then you go through and see what ratio of the offspring got the traits of the parents. For mine were to create phenotypes with 50% from each so my ratios were 2:4.

2.Can the genotype for a gray-bodied fly be determined? Why or why not? Describe all of the possible genotypes for a fly with that phenotype. Yes the genotype of a gray-bodied fly can be determined by doing a Punnet square for those types like I did one parent was Gg and the other was gg so the possibilities with were GG,Gg,GG,Gg which meant that all the offspring would be gray bodied fly’s.

3.Explain why an organism with a homozygous dominant genotype has the same phenotype as an organism with a heterozygous genotype. Well the reason that a homozygous dominant genotype has the same phenotype as a heterozygous genotype is like this which can be called by the information given a dihybrid crossing which, “or example, a heterozygous parent (PpTt) can pass on the following combinations of alleles: (PT), (Pt), (pT), (pt). Each box of the Punnett square is labeled with one of these possible combinations of alleles.” So when you look at it that way the offspring have both allies and that a homozygous and heterozygous cane have the same genotype 4.What genetic information can be obtained from a Punnett square? What genetic information cannot be determined from a Punnett square? The genetic information that can be obtained from the Punnett square is what kind of offspring two things will have and mostly likely what they will look, have, or be short, tall etc… The only genetic thing that cannot be determined is the sex that is something that can only be told once born, grown, or so on.

Cite This Document

Related Documents

  • Punnet Squares

    ...OCA 3 The traits I chose to do my Punnett squares on are my blue eyes and my freckles. I got my blue eyes from my dad, and my many freckles from my mom. Both my parents have homozygous alleles for blue eyes. My dad has AA and my mom has aa. While my dad has homozygous for freckles and my mom had heterozygous. My dad has no freckles so he has...

    Read More
  • Science Lab

    ...species. Charles Darwin’s theory of evolution emphasizes that populations, not individuals, evolve. The purpose of my experiment was to test the allele and genotype frequencies. Alleles for a gene are represented by letters of the alphabet. The theory of Hardy-Weinberg states that an allele and genotype frequencies in a population will re...

    Read More
  • Bio lab 156 lab 7

    ...Conor Westerman LAB 7 1. List whether the student was positive or negative for each characteristic and include whether the characteristic is dominant or recessive. (6 points) a. Blood type A+ b. Widow's peak yes, + c. Free ear lobes yes, + d. Tongue rolling yes, + e. Hitchhiker's thumb yes, + f. Left thumb dominance yes, + g. Little finger b...

    Read More
  • Fly Lab

    ...AP Lab # 7: Genetics of Organisms Virtual Fly Lab Link for flylab: You will be using a sample subscription, so once you sign up you will only have access for 24 hours. It is important to do all the pre-work before logging in to get your experimental numbers. Click on the fly lab button. After reading through the lab and understanding what you...

    Read More
  • The Square

    ...The Square The idea of a paperless monetary system takes a big leap forward thanks to the Square credit card reader. No longer is there a need for an expensive credit card machine that is fixed to a land line. Owners of an iPhone, iPad, or an Android device are now able to swipe credit card payments anywhere at anytime and have it deposited dir...

    Read More
  • Punnett Square Practice KEY

    ...  In rats, black color is dominant and white color is recessive. Cross heterozygous black rat with a white rat B=black b=white Bb x bb B b b P: 2/4 black, 2/4 white 1:1 b Bb bb Bb bb G: 2/4 Bb 2/4 bb 1:1   Can two white rats have a black offspring? Show the Punnett Square to confirm your answer B=black P: 4/4 white b=...

    Read More
  • Pedigree Analysis Using Punett Squares

    ...Name: Megan Jackson Date: November 20,2014 Graded Assignment Lab Report You may wish to construct the Punnett squares on scratch paper first before you fill in the Punnett squares on the Lab Report. Answer the questions below. When you are finished, submit this assignment to your teacher by the due date for full credit. Part 1: Monohybrid Cro...

    Read More
  • Bio Lab

    ...Hardy-Weinberg equations will be similar to the actual allele frequencies. MATERIALS: 8A: ~PTC paper 8B: ~Note cards PROCEDURE: 8A: 1. Using the PTC paper, rip off a piece and press it to the tip of your tongue. PTC tasters will sense a bitter taste. These individuals are considered tasters. 2. A number representing the frequenc...

    Read More

Discover the Best Free Essays on StudyMode

Conquer writer's block once and for all.

High Quality Essays

Our library contains thousands of carefully selected free research papers and essays.

Popular Topics

No matter the topic you're researching, chances are we have it covered.