1 / 8

Punnett Squares- Day 1

What are Punnett Squares?. Punnett Squares are used to figure out the genes and traits of offspring when the genes of the parents are known.They can also be used to find the parents genes.. First, some vocabulary to add. Genotype: genes, abbreviated with lettersPhenotype: physical traitsAllele:

bluma
Download Presentation

Punnett Squares- Day 1

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. Punnett Squares- Day 1 Objective: SWBAT construct and complete Punnett Squares in order to predict genetic outcomes. Drill: 1. Why are gametes haploid? What process in meiosis makes each gamete unique? Describe the cells made by fertilizaton.

    2. What are Punnett Squares? Punnett Squares are used to figure out the genes and traits of offspring when the genes of the parents are known. They can also be used to find the parents genes.

    3. First, some vocabulary to add… Genotype: genes, abbreviated with letters Phenotype: physical traits Allele: forms of a gene (A or a) Homozygous: 2 of the same gene (AA, aa) Heterozygous: 2 different genes (Aa) Dominant: the stronger gene; if present, it will always cover up the other gene and show dominant trait; shown with capital letters Recessive: the weaker gene; must have 2 copies to have the recessive trait; shown with lower-case letters

    4. Let’s Practice Describe the following GENOTYPES as either homozygous or heterozygous. If homozygous, specify dominant or recessive. 1. BB 4. Tt 7. ff 2. Rr 5. ee 8. AA 3. dd 6. KK 9. Hh

    5. Punnett Square Steps Read the scenario. Decide on the letter you will use to represent the gene. Write out the 3 possible genotypes AND the phenotype that goes with each. Figure out the parent genotypes. Draw a Punnett Square. Write the parent genotypes on the outside. One parent at top, other parent along left side. Fill in the offspring genotypes by bringing the parent genotypes over and down. Example: Parent 1= AA Parent 2= aa

More Related