Answers for Study guide!

1.       Give an example of a Homozygous Dominant, Homozygous Recessive and Heterozygous genotype.

 Homozygous Dominant = TT

 Heterozygous = Tt

 Homozygous resessive = tt

2.       What is a phenotype?

 It is the physical characteristic. What does the trait look like?

TT = Tall ;Tt = Tall; tt = Short

3.       Why did Mendel use Pea plants?

Easy to grow, create lots of offspring, can make pure traits, can control cross fertilization

4.       What were the parent and offspring genotypes and phenotypes in Mendel’s P1 cross?

 TTxtt         Genotypes = All Tt         Phenotype = All Tall

                  G. Ratio = All Alike           P Ratio = All alike

5.       What were the parent and offspring genotypes and phenotypes in Mendel’s F1 cross?

              TtxTt                     Genotypes = TT, Tt, tt                   Phenotypes = Tall; short

                                            G. Ratio = 1:2:1                            P. Ratio = 3:1

6.       What is the Law of Dominance?

 In a cross of pure contrasting traits all offspring will have heterozygous genotyoe and all take the dominant trait!

7.       What is the Law of Segregation?

          Alleles seperate in the formation of Gametes (sex cells) (sperm and egg) and then recombine during fertilization.

8.       What is the law of Independent assortment? And what kind of cross will show this?

 Alleles for different traits will seperate independently from one another. tall doesn't follow wrinkled seeds and short doesnt follow round seeds and so forth. You can see this in a Dihybrid cross

9.       How does Meiosis increase Genetic variability? And name where it happens.

1) Crossing over = Prophase 1
2)Independent assortment = Metaphase 1
3) Random fertilization = when the sperm fertilizes the egg
 

10) answers for pictures

1. Anaphase 1
2. Anaphase 2
3. Prophase 1
4. Metaphase 1
5. Metaphase 2
6. Telophase 1
7. Prophase 2
8. Telophase 2/ cytokinesis  This is the end product!

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EXAM SCHEDULE

EXAM SCHEDULE:

WED JAN. 19: 
MOD A 8:00-9:30 - MOD B 10:00-11:30 - MAKE-UP 1:OO

THU. JAN. 20:
MOD C 8:00-9:30 - MOD D 10:00-11:30 - MAKE-UP 1:00

MON. JAN 24: 
MOD E 8:00-9:30 - MOD F 10:00-11:30 - MAKE-UP 1:00

TUE JAN. 25: 
MOD G 8:00-9:30 - MOD H 10:00-11:30 - MAKE-UP 1:00

** Leave a comment here if you have any questions about your review sheet!!**

Photosythesis

PHOTOSYNTHESIS OVERVIEW

This is the light dependant phase and happens in the Thylakoid membrane!

This is the light independant phase and happens in the Stroma!

Tired from the turkey?

Does eating turkey make you tired? Turkey does contain tryptophan and is an amino acid and is used to make serotonin. Serotonin makes you feel calm, and makes you feel good! Unfortunately there is NOT enough tryptophan in the turkey to make you tired. Actually, cheese and chicken breast has more tryptophan than turkey! Then why are you sleepy? It is probably the stress of the holidays or all the fat and calories you just consumed!

Comment here!

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Why did we use water in the microscope lab?

You can put some samples directly under the microscope. However, many samples look better when placed in a drop of water on the microscope slide. This is known as a "wet mount." The water helps support the sample and it fills the space between the cover slip and the slide allowing light to pass easily through the slide, the sample, and the cover slip.

Reminders for the weekend!

Don't forget to change your clocks tonight!
Also Don't forget to bring in your pond water for Monday!