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Genetics #1 Review (complete, incomplete, and codominance) Flashcards | StudBud
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Genetics #1 Review (complete, incomplete, and codominance)
Genetics #1 Review (complete, incomplete, and codominance)
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1
Which of the following is an example of a phenotype?
Tt
Alleles
Brown eyes
Bb
2
Read the scenario below... how many seeds will be wrinkles
100%
75%
25%
50%
3
P generation stands for
Pea generation
Parent generation
Pre generation
Post generation
4
Read the scenario below...
50%
0%
100%
25%
5
Read the scenario below... what is the ratio of red to white eyes
4 red : 0 white
1 red : 3 white
1 red : 1 white
3 red : 1 white
6
From whom do we inherit our alleles?
Both our mother and father
Our grandparents
Only from our mother
Only from our father
7
What does the term "heterozygous" mean?
Having two different alleles for a trait
Having two identical alleles for a trait
Having only one allele for a trait
Having no alleles for a trait
8
Each box in a Punnett square represents:
The phenotype of the offspring
The parent’s traits
The number of offspring expected
A possible allele combination for the offspring
9
Blue, green, brown, and grey eyes are all examples of different ______ for eye color.
Alleles
Genes
Traits
Genotypes
10
In a genetic cross, which genotype would express the dominant trait?
aa
bb
Aa
a
11
Which genotype represents a heterozygous organism?
BB
aa
Aa
AA
12
Which of the following describes incomplete dominance?
Recessive allele is expressed in the presence of a dominant allele
Both alleles contribute to the phenotype, resulting in a blend
Dominant allele completely masks recessive allele
Both alleles are equally expressed
13
Read the scenario below... What is the genotype ratio of offspring from a cross between a roan cow and a red cow?
1:2 (RR:RW)
1:1 (RR:RW)
1:1 (RW:WW)
3:1 (RR:RW)
14
Read the scenario below... all of the genotypes will be
Recessive Alleles
Homozygous Dominat
Homozygous Recessive
Heterozygous
15
Which of the following describes the blending hypothesis of inheritance?
Traits are inherited independently.
Traits are mixed from both parents.
One allele from each parent is inherited.
Traits are passed through dominant and recessive alleles.
16
Which of the following represents a dominant allele?
bb
Aa
AA
A
17
Who invented the Punnett square?
Gregor Mendel
Reginald Punnett
Thomas Hunt Morgan
Charles Darwin
18
What is the phenotype of an organism with the genotype 'bb'
Incomplete dominance
Recessive trait expressed
Both traits are blended
Dominant trait expressed
19
Which of the following describes the Law of Dominance?
Only recessive alleles are passed down to offspring.
The dominant allele will always be expressed over a recessive allele.
Alleles segregate independently during gamete formation.
Traits are inherited from both parents equally.
20
What term refers to an organism’s physical appearance due to its genes?
Genotype
Allele
Chromosome
Phenotype
21
What phenotype would an organism with the genotype 'Aa' show if 'A' is dominant?
Both traits equally expressed
Recessive trait
Dominant trait
No trait expressed
22
Who is known as the father of genetics?
Charles Darwin
Reginald Punnett
Louis Pasteur
Gregor Mendel
23
Read the scenario below... What are the % expected genotypes
50% PP, 50% Pp
100% PP
75% PP, 25% Pp
100& Pp
24
Which genotype represents a recessive allele being expressed?
AA
AB
Aa
bb
25
What do lowercase letters represent in genetics?
Dominant alleles
Alleles that are not expressed
Both dominant and recessive alleles
Recessive alleles
26
What is the name of the tool we use for predicting the traits of offspring?
Chromosome map
Punnett square
Pedigree chart
Karyotype
27
What is the study of how genes and traits are passed down from one generation to the next called?
Cell Biology
Evolution
Ecology
Genetics
28
F1 generation stands for:
The generation produced by crossing F1 individuals
The parent generation
The second generation of offspring
The first generation of offspring
29
Read the scenario below...
75% red, 25% white
100% red
50% red, 50% pink
50% pink, 50% white
30
What is the probability of each box in a Punnett square representing an offspring’s genotype?
75%
100%
50%
25%
31
Which of the following represents a homozygous dominant genotype?
aa
Aa
Bb
BB
32
Read the scenario below...
0%
50%
25%
100%
33
What is the phenotype of an organism with the genotype 'BB'?
No trait is expressed
Dominant trait expressed
Incomplete dominance
Recessive trait expressed
34
How many alleles do we inherit from each parent?
3
2
None
1
35
What do capital letters represent in genetics?
Recessive alleles
Alleles that are not expressed
Dominant alleles
Both dominant and recessive alleles
36
Which of the following is correct for the law of segregation?
Alleles always stay together.
One allele is always dominant.
Alleles separate during gamete formation.
Alleles separate independently.
37
Read the scenario below... All flowers will have what phenotype
50% purple, 50% white
100% purple
75% purple 25% white
100% white
38
The blending hypothesis has been proven to be true for Mendelian traits and is still followed today.
False
True
39
Read the scenario below...
50%
25%
75%
100%
40
F2 generation stands for:
The parental generation
The second generation of offspring
The first generation of offspring
The last generation of offspring
41
What term refers to different versions of a gene and is represented by a single letter?
Allele
Trait
Gene
Chromosome
42
Which of the following describes complete dominance?
Recessive allele is expressed in the presence of a dominant allele
Both alleles contribute equally
Dominant allele is expressed only in homozygous form
Dominant allele masks recessive allele in heterozygous
43
What term refers to the combination of alleles present in an organism's cells?
Phenotype
Trait
Genotype
Gene
44
What does "true breeding" mean in genetics?
Organisms with heterozygous alleles that produce varied offspring.
Organisms that have only one allele for a particular trait.
Organisms that produce offspring with the same traits over generations
Organisms that have dominant alleles for every trait.
45
Read the scenario below... what is the phenotype ratio of round to wrinkled seeds
4:0
3:1
1:3
1:1
46
What does the term "homozygous" mean?
Having two identical alleles for a trait
Having two different alleles for a trait
Having only one allele for a trait
Having no alleles for a trait
47
Read the scenario below... what is the % of white rabbits
0%
100%
25%
75%
48
T = tall and t = short. if a plant has the genotype Tt, that is its phenotype
Tall stems
The plant is neither tall or short
Short stems
A mixture of tall and short stems
49
Segment of DNA that codes for a trait
Chromosome
Allele
Protein
Gene
50
Which of the following describes codominance?
The alleles blend together in the phenotype
Both alleles are equally expressed in the phenotype
One allele completely masks the other
Only the dominant allele is expressed
