Mendelian genetics

744 views
643 views

Published on

Published in: Education, Lifestyle, Technology
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
744
On SlideShare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
18
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Mendelian genetics

  1. 1. Mendelian Genetics Biology I Mr. Nettles
  2. 2. Today’s Agenda – Wed. Nov. 16, 2011 <ul><li>Warm-up (Who is Gregor Mendel?) </li></ul><ul><li>Vocabulary Find </li></ul><ul><li>Any remaining time will be dedicated to A-Plus </li></ul>
  3. 3. Today’s Objective <ul><li>I will explore the life of Gregor Mendel. </li></ul><ul><li>I will define 16 key vocabulary term related to Mendelian Genetics. </li></ul>
  4. 4. Warm-Up (Nov. 16) <ul><li>Use an Internet Browser (Yahoo or Google) to search “Gregor Mendel.” </li></ul><ul><li>Take about 10 minutes to read about his life. </li></ul><ul><li>Take about 5 minutes to write three to five sentences about his life. </li></ul><ul><li>Share your findings with the class. </li></ul>
  5. 5. <ul><li>adenine and cytosine </li></ul><ul><li>cytosine and thymine </li></ul><ul><li>thymine and guanine </li></ul><ul><li>cytosine and guanine </li></ul>Which of the following shows the correct pairing of DNA bases? Cellular Energy Warm-Up (Nov. 14)
  6. 6. Today’s Agenda – Mon. Nov. 21, 2011 <ul><li>Warm-up (EOC Practice Problems) </li></ul><ul><li>Genetics: Alleles, Monohybrid Crosses, Punnett Squares </li></ul><ul><li>Example Simple Genetics Problems </li></ul>
  7. 7. Mendelian Genetics Biology I Mr. Nettles
  8. 8. Today’s Objectives <ul><li>I will explore the use of Punnett Squares to solve simple genetics problems. </li></ul><ul><li>I will understand the difference between homozygous and heterozygous. </li></ul><ul><li>I will understand the difference between genotype and phenotype. </li></ul><ul><li>I will understand the difference between dominant and recessive. </li></ul>
  9. 9. Warm-Up (Nov. 21)
  10. 10. Warm-Up (Nov. 21)
  11. 11. Warm-Up (Nov. 21)
  12. 12. Warm-Up (Nov. 21)
  13. 13. Warm-Up (Nov. 21)
  14. 14. Alleles <ul><li>Alleles are different forms of genes. </li></ul><ul><ul><li>Homozygous – both alleles are the same </li></ul></ul><ul><ul><li>Heterozygous – both alleles are different </li></ul></ul>
  15. 15. Dominant vs. Recessive <ul><li>Dominant Allele – the expressed trait </li></ul><ul><ul><li>it’s the trait that you see </li></ul></ul><ul><ul><li>usually represented by a capital letter </li></ul></ul><ul><li>Recessive Allele – the masked trait </li></ul><ul><ul><li>it’s the trait that’s covered up when a dominant allele is present </li></ul></ul><ul><ul><li>usually represented by a lowercase letter </li></ul></ul>
  16. 16. Dominant vs. Recessive <ul><li>In Mendel’s pea plant experiment green was dominant over yellow. </li></ul><ul><ul><li>G = green (dominant) </li></ul></ul><ul><ul><li>g = yellow (recessive) </li></ul></ul><ul><li>The Alleles for Pea Plant Color </li></ul><ul><ul><li>GG = homozygous green </li></ul></ul><ul><ul><li>Gg = heterozygous green </li></ul></ul><ul><ul><li>gg = homozygous yellow </li></ul></ul>
  17. 17. Monohybrid Cross <ul><li>A monohybrid cross is the study of one trait only. </li></ul><ul><ul><li>Mendel used monohybrid crosses to study pea plant color and form separately. </li></ul></ul>
  18. 18. Punnett Squares <ul><li>Punnett Squares show possible combinations of alleles from genetic crosses. </li></ul>
  19. 19. Punnett Squares <ul><li>Phenotypes – physical characteristics </li></ul><ul><ul><li>3 purple flowers </li></ul></ul><ul><ul><li>1 white flower </li></ul></ul><ul><li>Genotypes – genetic makeup </li></ul><ul><ul><li>1 PP (homozygous purple) </li></ul></ul><ul><ul><li>2 Pp (heterozygous purple) </li></ul></ul><ul><ul><li>1 pp (homozygous white) </li></ul></ul>Pp x Pp
  20. 20. Quiz Tomorrow!! <ul><li>Study Vocabulary Words from last week!! </li></ul><ul><li>Work example problems from handout!! (Hint, Hint) </li></ul><ul><li>Ask Mr. Nettles for help on the problems you don’t understand well!! </li></ul>

×