15. What is a chart that shows how a trait is inherited through a family called? ... ______ One allele can mask or cover up the other allele. 24. ____...
Genetics Review Questions Due March 19, 2018 Part 1: Fill in the blank 1. What is genetics? _____________________________________________________________________ _____________________________________________________________________ 2. Who is the father of genetics? _____________________________________________ 3. What type of organism did he study? _______________________________________ 4. What is an allele? _____________________________________________________________________ _____________________________________________________________________ 5. What is a gene? _____________________________________________________________________ _____________________________________________________________________ 6. How many alleles are in a gene? ______________ 7. The male sex cell is a _________________________ while the female sex cell is an _________________________. 8. If an organism has the genotype Hh, what possible alleles could be passed on? _____________________________________________________________________ 9. Homozygous is to purebred as heterozygous is to _____________________________.
10.
A genotype is an organism’s ________________________________________
while a phenotype is an organism’s _______________________________________. 11.
What are the 3 blood type alleles? __________, __________ and ___________.
12.
What makes blood “positive”? ______________________
13.
What is the most rare blood type in humans? _____________________
14.
What blood type is considered the “universal donor?” ______________________
15.
What is a chart that shows how a trait is inherited through a family called?
________ Both alleles are dominant and therefore both are expressed
23.
________ One allele can mask or cover up the other allele
24.
________ There are no dominant alleles, the alleles mix when paired together
25.
_______ Uses the same letter, one uppercase and one lowercase
26.
_______ Uses two different letters, both uppercase
Fill in the following tables: write the correct genotypes or phenotypes for each genotype Complete Dominance
Incomplete Dominance
Codominance
Green eyes are dominant to hazel
Dark skin is incompletely dominant Brown color is codominant to
eyes
to light skin
yellow color in cheetahs.
GG: _______________________
dd: ________________________
BB: ________________________
Gg: ________________________
dl: _______________________
YY: ________________________
gg: ________________________
ll: ________________________
BY: ________________________
PTC tasting is dominant to PTC
Straight hair is incompletely
White cattle are codominant to
non-tasters
dominant to curly hair
brown cattle
___________= Tasters
_________: Straight Hair
_________: White cattle
__________ = Tasters
_________: Curly Hair
_________: Brown cattle
__________ = Non-tasters
_________: Wavy hair
_________: Spotted cattle
Blood Types
Blood is a multiple allele trait that has the alleles A, B and o. A and B are codominant and o is recessive to both A and B. _________________________: Type A Blood
__________________________: Type B blood
_________________________: Type AB Blood
__________________________: Type O blood
Part 3. Problems 1. In giraffes, a long neck is incompletely dominant to a short neck. Cross two heterozygous giraffes.
2.
In mice short whiskers are dominant to long whiskers. Cross a long whiskered male with
a short whiskered female mouse, whose father had long whiskers.
3. Linda is a 17-year-old high school student taking AP genetics. Linda is supposed to find out the blood types of both of her parents for a genetics project but Linda’s father is out of the country on business. After talking to her mom, Linda found out she has type B blood and her mom has type A blood. She also found out that her older sister has type A blood. Can you help Linda by finding the genotypes of both her parents?
4. In mice black hair is incompletely dominant to albino (white) hair. Cross an albino female, whose father is gray, to a gray male, whose mother was albino.
5. In one species of fire ants there is a gene that codes for their poison. In this species of ants, the poison can make skin burn, make skin itch or make skin burn and itch. John captured ants that bit him and made his skin burn while Alex captured ants that bit him and made his skin burn and itch. Alex and John want to cross their ants and see what the offspring’s poison does to their skin.
6. In humans, bald toes are dominant to hairy toes. Sarah is falling madly in love with Frodo Baggins but is worried that her children will have toes as hairy as Frodo’s. Sarah’s family has never had hairy toes, and would not be very accepting of a hairy-toed child. Can Sarah decide to marry Frodo and keep her family happy?