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WorksheetsGenetics Study Guide
Total questions: 40
Worksheet time: 39mins
Name
Class
Date
1.
An animals performance is based off of...
a)
environment + nurture
b)
Genetics + Nature
c)
Environment + Genetics
2.
Which of the following is a genotype
a)
Brown Coat
b)
AA (Genetic code)
c)
41" hip height
d)
Traits
3.
Which of the following is a phenotype?
a)
Bb (Genetic Code)
b)
Brown Coat
c)
Non-observable traits
d)
Recessive gen
4.
Which of the following is an example of a heterozygous genotype?
a)
AA
b)
AB
c)
Aa
d)
aa
5.
Which of the following is an example of a homozygous recessive genotype?
a)
Aa
b)
AB
c)
AA
d)
aa
6.
What is the genotypic ratio here
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
7.
To express the recessive trait you must be
a)
homozygous dominant
b)
heterozygous
c)
alleleerific
d)
homozygous recessive
8.
Hybrid vigor is an advantage of which breeding strategy?
a)
Inbreeding
b)
Linebreeding
c)
Crossbreeding
d)
Purebreed
9.
Which breeding system is the following
–Mating related animals
•Half siblings
•Grandsire x granddaughter (skip generation)
–Mating related animals
•Half siblings
•Grandsire x granddaughter (skip generation)
a)
Inbreeding
b)
Linebreeding
c)
Commercial breeding
d)
Purebreed
10.
What breeding strategy can isolate very rare genes by mating very closely related animals?
a)
Breeding only purebreds
b)
Line breeding
c)
Inbreeding
d)
Crossbreeding
11.
Which of the following is not an Dairy Cattle EPD?
MILK: Total Milk Production (in pounds)
CED: Calving Ease Direct
Protein: Milk’s protein content (in pounds)
SCS: Somatic Cell Score
MILK: Total Milk Production (in pounds)
CED: Calving Ease Direct
Protein: Milk’s protein content (in pounds)
SCS: Somatic Cell Score
a)
MILK
b)
CED
c)
Protein
d)
SCS
12.
Yellow Lab
a)
Qualitative
b)
Quantitative
13.
Lamb weigh 5 lbs at birth
a)
Quantitative
b)
Qualitative
14.
Nature determines which animals reproduce. Also known as “Survival of the Fittest.”
a)
Artificial Selection
b)
Natural Selection
c)
Alelle
d)
Punnet square
15.
Define the following: External conditions that affect the traits and performance of an animal.
a)
Enviroment
b)
Genetics
c)
Dominate
d)
Alelle
16.
Define the following: A number from 0.0 - 1.0 representing how much a specific trait is affected by the animal’s genetic information
a)
Heritability
b)
Heritability Factor
c)
Enviroment
d)
Genetics
17.
An inheritance factor of .80 is highly heritable.
a)
True
b)
False
18.
A ________ is a form of a gene found in pairs on each chromosome.
a)
Calving Ease
b)
Gene
c)
Alelle
d)
Enviroment
19.
Which breeding system is where all animals are registered and whose goal is to produce high quality breeding stock?
a)
Commercial Breeding
b)
Line Breeding
c)
Purebred Breeding
d)
Inbreeding
20.
Which breeding system is where breeding females are not purebred, but they breed to higher quality sires in hopes of improving each generation?
a)
Commercial Breeding
b)
Line Breeding
c)
Purebred Breeding
d)
Inbreeding
21.
A beef bull has an EPD for birth weight (BW) of 5, thus which statement below is true?
a)
His calves will be 5 times as big as the average
b)
5 more calves will be born than average
c)
His calves will weigh 5 pounds more than average
d)
1/5 of calves will be small at birth
22.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
23.
Sex Cell alleles are found in pairs.
a)
True
b)
False
24.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
25.
How many boxes would say BB?
a)
1
b)
2
c)
4
d)
0
26.
T - tall and t = short
In the punnett square below, what belongs in the missing square
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
27.
If B = brown hair and b = blonde hair, what is the probability of brown hair?
a)
25%
b)
50%
c)
0%
d)
75%
28.
Brown is dominant to green. What is the probability of these parents having green offspring?
a)
1/4
b)
2/4
c)
3/4
d)
4/4
29.
A Punnet Square will
a)
tell you exactly what your offspring will look like
b)
increase the chance you pass on recessive traits
c)
predict genotypes and phenotypes in offspring
d)
have no purpose but for Taylor to give us extra assignments
30.
the genetic makeup of an organism
a)
heterozygous
b)
punnet square
c)
genotype
31.
What traits is controlled by a SINGLE pair of genes?
a)
Qualitative
b)
Quantitative
c)
Recessive
d)
Dominate
32.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
33.
Which of the following is an example of a homozygous dominate genotype?
a)
aa
b)
Aa
c)
AA
d)
aAa
34.
If a Homozygous red snapdragon and a Heterozygous pink snapdragon were crossed - what percentage of the offspring would be homozygous white?
a)
0%
b)
25%
c)
50%
d)
75%
35.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
36.
The leaf is 5 mm wide.
a)
qualitative
b)
quantitative
37.
The clouds are grey and ground is wet.
a)
qualitative
b)
quantitative
38.
There are 20 students in our classroom.
a)
quantitative
b)
qualitative
39.
The leaves on the plant are turning brown.
a)
qualitative
b)
quantitative
c)
both
d)
neither
40.
What does the acronym "EPD" stand for?
a)
Extra People Die
b)
Every Parent Doubles
c)
Estimated Progeny Difference
d)
Exact Progeny Difference
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