2.  What causes some hydrangeas to be pink but others blue? Different environmental conditions and PH levels of soil

3.  Why do the number of stomates on leaves vary? Same genes can offer different stomates due to atmospheric conditions

4.  In phenotypic plasticity the _genes __________   are not changing, but the __________phenotypes_______________ is changing.

REMEMBER: Watch the video all the way to the end so that AP Classroom gives your credit for watching the video

2.  How does segregation of alleles contribute to genetic variation? They provide more opportunity for random assortment and varied combinations when parental alleles are segregated into gametes when fertilization occurs. 

3.  What is the law of independent assortment? Suggests that genes for two or more traits will be sorted into gametes independently; genes are not linked; inheritance of each gene is random 

4.  How does the independent assortment of chromosomes lead to genetic variation? It provides more possible gene combinations when genes are assorted independently into gametes 

5.  How does random fertilization contribute to genetic variation? It suggests that there can be offspring with genetically unique combination of chromosomes

6.  _______Random fertilization _______________ contribute to genetic diversity in offspring.

7.  What is nondisjunction?  What is the result of a nondisjunction event? Failure of chromosomes to fully separate during formation of gametes; too many or too few chromosomes in sex cells

8.  Pause the video at 6:30.  Predict the most likely cause of the karyotype illustrated in the question.

REMEMBER: Watch the video all the way to the end so that AP Classroom gives your credit for watching the video

2.  What causes Huntington’s Disease?  What is its inheritance pattern? Progressive and fatal disorder; caused by a single defective gene on chromosome 4

3.  Pause the video at 4:30.  If a woman who is heterozygous for hemophilia has children with a man who has normal clotting function, and they have a daughter, what is the daughter’s chance of having hemophilia?  If the same couple has a son, what is the son’s chance of having hemophilia?  (NOTE: this is a different question than the one asked in the video! Draw a Punnett Square to help you answer this question). 50%

REMEMBER: Watch the video all the way to the end so that AP Classroom gives your credit for watching the video