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Monohybrid crossing
Slide 1 - Diapositive
Class rules
1. When i am explaining something, you listen; 2. Questions? Raise your hand; 3. Phones are in your bag; 4. At the end of the class i will tell you when to pack, don't start when i'm still talking; 5. At the end of the class, make sure your chair is pushed back under your desk.
Slide 2 - Diapositive
Today
1. Working with monohybrid Punnett squares 3. Practicing
Learning goals: 1. Learn about monohybrid crossing 2. Be able to perform a monohybrid crossing with a punnett square
The part of a chromosome that determines a trait, like eye colour
Allele
Different forms of the same gene. Like brown, green and blue eye colour.
Dominant
The allele that is expressed
Recessive
The allele that is not expressed, only when two of these are paired, are they expressed
Genotype
Your inherited genetic characteristics.
Phenotype
How your inhereted characteristics are represented. So eye colour, hight, blood type and more.
Homozygous
Two of the same alleles.
Heterozygous
Two different alleles.
Slide 4 - Diapositive
Monohybrid crossing
Slide 5 - Diapositive
Let's practice
In mussels, brown coloring (B) is dominant, and blue coloring (b) is recessive. A homozygous brown mussel crosses with a blue mussel.
What percentage of offspring are expected to be brown? 0%, 25%, 50%, 75% or 100%?
Slide 6 - Diapositive
One more
Slide 7 - Diapositive
Assignment
1. Practice the monohybrid crossing with a punnett square
Websites to practice with: Youtube - Amoeba Sisters: Monohybrids and the Punnett Square Guinea Pigs Khan Academy - Monohybrid punnett squares (practice) Assignment 23, 24, 25, 26 and 27, 28 and 29 of your workbook
Done? Make your summary of paragraph 5.4
Discussion about the questions allowed.
Need help?
Ask the teachter
Slide 8 - Diapositive
What did we learn today?
Learning goals:
1. You are now able to perform a monohybrid crossing with a punnett square
Slide 9 - Diapositive
Homework
1. Practice with the punnett square
2. If you already find this very easy and you want to practice something harder for fun, you can practice with Dihybrid punnett squares. Look online for an assignment.
Dont forget to push your chair back under your desk!