Punnett Squares

another example

Questions from the Video"

1.What is an allele?

2.Explain the relationship between “dominant” and “recessive” traits

3.Define Heterozygous and Homozygous

4.What is meant by genotype and phenotype?

Meiosis Pop-Bead Questions

Here are the questions from this week's investigation

• What is the end result of meiosis?
• Is an unfertilized egg haploid, diploid, or tetraploid? What about a sperm cell? What about a fertilized egg?
• How many different sources of DNA (different colors) does your fertilized egg have?
• Let’s assume that each popbead is a gene. Look at your fertilized egg. How many genes came from the: paternal grandfather (blue), paternal grandmother (red), maternal grandfather (green), and maternal grandmother (yellow)? Are these numbers the same for other groups?
• A friend asks you, “Me and my sister have the same two parents. If we both got our DNA from the same two people, why don’t we look like twins?” What would you say to your friend?
• Look at the genes for baldness in your fertilized egg. Did it originate from the paternal grandfather (blue), paternal grandmother (red), maternal grandfather (green), or maternal grandmother (yellow)? (Hint there should be two answers)
• Billy is a growing fetus. Billy's parents want Billy the fetus to have the maternal grandmother's beautiful freckles, however the maternal grandfather, paternal grandparents, and the parents do not have freckles. Is it likely that Billy the fetus will inherit the maternal grandmother’s gene for freckles? Why or why not?
• Everyone's embryo at the end of the activity is different. What three steps did we do in this activity that contributed (played a part) in this variation (differences) for each embryo?

Enrichment Questions for Friday

• Describe the similarities and differences between Mitosis and Meiosis (use your science vocab).
• Write a ClEvR statement to support or refute the following statement:  "Meiosis is not a cycle."
• Where does the variability in Genes come from in Meiosis? (identify three sources)

Skin Color Interactive Activity

Open your packet and answer the anticipatory questions.

Go to this link and click launch interactive. There should be a video playing. If you didn't bring headphones, you can either play it quietly at your desk or turn on closed captions.

Once you've finished watching the video through, replay it and stop at the first white line.

Go to contents and click on the first link (What is skin). Answer the questions in the packet under the heading "First stop point: What is Skin?"

Resume the video until you get to the next stop point. Repeat the process until you have finished all the questions in your packet.

Ask Mr. Sultzer if you have any questions.

Trancription/Translation and Epigenetics Notes

Here are some of the power points I've been using over the last week, if you would like to use them to take notes.

Transcription/Translation

Epigenetics