1. Bellwork: Tues. Jan. 18, 2018
Look at page 312 – figure What does Mendel’s law of segregation mean? Look at page 317 of your book: 2. What does the principle of independent assortment mean?

2. Bellwork: Tues. Jan. 16, 2018 Mendel’s law of segregation
During gamete formation alleles segregate or separate from each other so each gamete carries only a single copy of each gene
Principle of independent assortment
Genes for separate traits can segregate independently during the formation of gametes allowing for genetic variation even when parents are the same.

3. Dragon Lab

4. Sex Chromosomes XX = female
DECODING OF THE GENES
Chromosome Dominant genes Recessive genes
Green A. no chin spike a. chin spike
B. nose spike b. no nose spike
C. three head flaps c. four head flaps
D. four toes d. three toes
E. long arms e. short arms
______________________________________________________________________
Red F. long neck f. short neck
G. no back hump g. back hump
H. no back spikes h. back spikes
I. long tail i. short tail
J. flat feet j. arched feet
Orange K. red eyes k. yellow eyes
I. spots on neck l. no spots on neck
M. no fang m. fang
N. spots on back n. no spots on back
Brown O. no spots on thigh o. spots on thigh
P. green body p. purple body
__________________________________________________________________________________________________________________
Sex Chromosomes XX = female
XY= male

5. The pink and blue popsicle sticks represent sex chromosomes.
With your partner, decide who is the female parent and who is the male parent.
Each partner must have the following colored popsicle sticks -- one green, red, orange, and brown. The mother dragon must have the pink stick and the father must have the blue stick.
The pink and blue popsicle sticks represent sex chromosomes.
The green, red orange and brown chromosomes represent autosomes. 
Each side of a stick represents a chromosome, and the two sides together represent a pair of homologous chromosomes (paired chromosomes).  
Before randomly mixing the genetic traits (i.e. mating) you and your partner must record each parent’s genotype in the appropriate data table.  
For each chromosome, each parent will randomly drop his or her stick on the table.
The side of the stick that is up represents the chromosome that is passed on to the baby.
The alleles from each pair of homologous chromosomes will be recorded in the data chart.

6. The decoding indicates the phenotype of each allele
The decoding indicates the phenotype of each allele. The phenotype (trait) produced by each pair of alleles should be recorded in the data chart. Remember that a CAPITAL letter is dominant over the lowercase letter, or in other words, the lowercase letter is recessive to the capital letter.
DRAW your baby dragon once you and your partner have figured out its phenotype.
Be prepared to share your drawing with the class!
Answer the analysis questions at the end of this lab.

7. How does dropping the stick on the table and transcribing the letters on the sides facing up follow Mendel’s Law of Segregation? (First state the law)
5. Explain how dropping the green, orange, and red sticks illustrate Mendel’s Law of Independent Assortment? (First state the law)

8. Mendel’s law of segregation
During gamete formation alleles segregate or separate from each other so each gamete carries only a single copy of each gene (1 allele_
Principle of independent assortment
Genes for separate traits can segregate independently during the formation of gametes allowing for genetic variation even when parents are the same. (Especially if they are far appart on the chromosome or on a different chromosome

9. Bellwork: Fri. Jan. 23, 2015
Dropping the stick on the table and transcribing the letters
on the sides facing up follow Mendel’s Law of Segregation
because you write only the letters on__________________
_________________________________________________
Dropping the green, orange, and red sticks illustrate Mendel’s Law of Independent Assortment because if the genes are
on different __________________________________
____________________________________________

10. Write both sides of each popsicle stick Flip the sticks and
Look up the trait
on the lab sheet
Write both sides of
each popsicle stick
Flip the sticks and
only write the sides
of each stick that
face up

12. Sex Chromosomes XX = female
DECODING OF THE GENES
Chromosome Dominant genes Recessive genes
Green A. no chin spike a. chin spike
B. nose spike b. no nose spike
C. three head flaps c. four head flaps
D. four toes d. three toes
E. long arms e. short arms
______________________________________________________________________
Red F. long neck f. short neck
G. no back hump g. back hump
H. no back spikes h. back spikes
I. long tail i. short tail
J. flat feet j. arched feet
Orange K. red eyes k. yellow eyes
I. spots on neck l. no spots on neck
M. no fang m. fang
N. spots on back n. no spots on back
Brown O. no spots on thigh o. spots on thigh
P. green body p. purple body
__________________________________________________________________________________________________________________
Sex Chromosomes XX = female
XY= male

14. Mendel’s law of segregation
During gamete formation alleles segregate or separate from each other so each gamete carries only a single copy of each gene
Principle of independent assortment
Genes for separate traits can segregate independently during the formation of gametes allowing for genetic variation even when parents are the same.

15. How does dropping the stick on the table and transcribing the letters on the sides facing up follow Mendel’s Law of Segregation? (First state the law)
5. Explain how dropping the green, orange, and red sticks illustrate Mendel’s Law of Independent Assortment? (First state the law)
Each member of the allele pair separates
from the other to form the genetic make-up of the gamete
Alleles on one side (chromosome) separate from the other to form a new gamete
Genes for different traits (on different chromosomes) can segregate independently during the formation of gametes.
Alleles on one chromosome separate independently from alleles on another chromosome