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Heredity Unit Test Extra Credit Contest
Test Description: Extra credit for the top 3 scores in each period 1st prize 5 extra credit 2nd prize 3 extra credit 3rd prize 2 extra credit
Instructions: Answer all questions to get your test result.
1) 1. Remember that nucleotide are like puzzle pieces that only fit with one other nucleotide. Which of these nucleotide pairs are NOT correct.
A
Thymine and Cytosine TC
B
Guanine and Cytosine GC
C
Adenine and Thymine AT
D
Cytosine and Guanine CG
2) DNA looks most similar to
A
a twisted ladder
B
spaghetti noodles
C
hot air balloons
D
pebbles on a beach
3) True or False: Chromosomes cannot be inherited
A
False
B
True
4) Which are NOT a genetic trait?
A
Fear of snakes
B
Height
C
Eye color
D
Big Feet
5) Gregor Mendel studied what plant to discover the fundamentals of traits?
A
Peas
B
Corn
C
Potatoes
D
Petunias
6) What is a Mendelian Trait?
A
Create new DNA
B
The genetic makeup of an individual
C
A trait determined by only one gene
D
nucleotide
7) What is a Sex Linked trait?
A
Two chromosomes containing genes for the same traits
B
Some traits are determined by multiple genes.
C
The ongoing debate related to the link between genetics and environment in determining traits
D
A gene that is located on the 23rd pair of chromosomes
8) D is a dominate trait for an orange beak and d is a recessive trait for a yellow beak. If your turkey had a genotype of Dd, what color beak will you turkey have?
A
orange
B
a shorter beak
C
no color
D
yellow
9) Brown eyes are a dominate trait. Blues eyes are a recessive trait. The father has brown eyes and the mother has blue eyes, what is the ONLY way the child will have blue eyes.
A
If the mother's blue eye gene is genetically dominate.
B
none of the choices
C
If the father's brown eye gene is recessive too.
D
If the father has a recessive blue gene also, and the child receives the recessive blue gene from both parents.
10) If F means tongue flipper and f means non-flipper, which student would be a non-flipper?
A
XY
B
Ff
C
ff
D
FF
11) Why are non-Mendelian traits considered rule breakers?
A
all of the choices
B
none of the choices
C
Because its possible for the dominant gene to be expressed
D
Because its possible for the dominant gene to not be expressed
12) Which statement best describes complete dominance?
A
When the dominant and recessive alleles mix to form a third phenotype.
B
When both the dominant and recessive alleles are shown.
C
When the dominant trait completely masks the recessive allele.
13) Which of these best describes incomplete dominance?
A
none of these choices
B
When the dominant allele hides (covers up) the recessive allele.
C
When both the dominant and recessive allele express a phenotype (like spots).
D
When the dominant and recessive alleles blend (mix together) and create a third phenotype.
14) What is codominance?
A
none of the choices
B
The dominant allele completely masks the recessive allele.
C
both alleles are expressed
D
all of the choices
15) In codominance, if you breed a black chicken with a white chicken, what do you think the result will be?
A
50% will be black and 50% will be White
B
100% will be black and white speckled
C
100% will be gray
D
none of the choices
16) If you cross a red flower with a white flower what phenotype should you expect in 100% of the offspring if snapdragon flowers are expressed via incomplete dominance?
A
Red
B
White
C
Pink
D
Yellow
17) Which chromosome NEVER EVER get a superscript (like an exponent)?
A
None of the choices
B
Both of the choices
C
X
D
Y
18) Which of the following is a Heterozygous trait?
A
Aa
B
AA
C
aa
D
BB
19) Which of the following is a homozygous recessive trait?
A
TT
B
Tt
C
tt
D
Aa
20) A carrier is someone who carries a recessive allele but who has the dominant trait because she is heterozygous.
A
True
B
False
*select an answer for all questions
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