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Chapter 9 & 12- Genetics Flashcards | StudBud
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Chapter 9 & 12- Genetics
Chapter 9 & 12- Genetics
40 terms
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#genetics
Flashcards
40 cards
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Practice quiz
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Host live
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Questions
40
Answers
1
If a cats skin cell has 30 chromosomes, it‘s gametes have a number of _________
30
20
10
15
2
Homozygous recessive
tT
Tt
TT
tt
3
If black (B) is codominant with white feather (W). BW have both and are speckled. BW x BW = ___
Black or speckled
White or speckled
Only speckled
Black, white or speckled
4
A cross between homozygous purple and homozygous white flowers result in all purple. This is..
The blending model of genetics
a dihybrid cross
dominance
the mistakes of Mendel
5
On a pedigree, what does a white non-colored in square represent?
Female with the disorder
Female without the disorder
Male without the disorder
Male with the disorder
6
A trait whose allele is located on the X or Y chromosome
Phenotype
Genotype
Sex-linked trait
Allele
7
a normal gene is shown as X
N
and a colorblind vision is shown as X
n.
What is colorblind female?
Xn Xn
XN Xn
XN XN
XN Y
8
Which is
NOT TRUE
about a organism that is heterozygous?
They always produce a recessive offspring
They possess 2 different genes for a given trait.
They are expressed as dominant
They can be considered a carrier for a given trait
9
Heterozygous dominant
tt
TT
tT
Tt
10
Which is a colorblind male?
Xn Xn
XN Y
XN XN
Xn Y
11
Which is not a somatic cell?
Muscle cell
Skin cell
Egg cell (ovum)
Nerve cell
12
The end result of meiosis is....
4 daughter cells w/ half # of chromosomes as original cell
1 daughter cell with the same # of chromosomes as original
2 daughter cells w/ half # of chromosomes as original cell
2 daughter cells w/same # of chromosomes as original cell
13
What % would a cross of Rr x Rr have a rr offspring?
75%
50%
25%
100%
14
The chance a specific event will occur is called ____
Punnett square
Homozygous
Probability
Genetics
15
X-linked traits are more commonly passed from......
Male carriers to their sons
Heterozygous individuals
Female carriers to their sons
Homozygous individuals
16
The physical appearance of traits in an organism.
Genotype
Sex-linked trait
Phenotype
Alleles
17
What is the phenotype of Rr?
Heterozygous dominant round
Homozygous recessive wrinkled
Homozygous dominant round
Heterozygous recessive wrinkled
18
A human female has ______ sex chromosomes, and males have ____.
XXX, XY
XX, XY
XY, XX
XO, XXY
19
The different versions of a trait expressed, such as GG, gg, or Gg.
Genetics
Alleles
Genotype
Phenotype
20
If R = round and r= wrinkled what is the phenotype of Rr individual?
Round
Both round and wrinkled
1/2 round, 1 wrinkled
Wrinkled
21
Human somatic cells contain ____ chromosomes, and their gametes contain __.
1, 2
46, 23
23, 46
23, 23
22
Which of the following is NOT true about gametes?
gametes contain genetic diversity
gametes are created during meiosis
egg and sperm cells are gametes
gametes are diploid ( 2 n)
23
What is a family history that shows how a trait is passed down through a family called?
Pedigree
trait
probability
Punnett square
24
Why does heterozygous recessive
NOT
exist?
Heterozygous has 2 different alleles making it dominant
Homozygous has only 1 allele making it recessive
Homozygous has 2 different alleles making it dominant
Heterozygous has 2 identical alleles making it recessive
25
A plant TT mates w/ a plant “tt”, predict what would offspring’s genotype ratio be?
2 Tt : 2 tt
4 TT
4 Tt
3 Tt : 1 tt
26
Haploid ( n ) means....
Half the number of chromosomes in a cell
Not enough information in a cell
Double the number of chromosomes in a cell
Original number of chromosomes in a cell
27
On a pedigree, what does a solid colored circle represent?
Male without the disorder
Female with the disorder
Male with the disorder
Female without the disorder
28
If a female is colorblind, how many copies of the mutated gene must her X chromosomes have?
2
3
None
1
29
Homozygous dominant
tt
tT
TT
Tt
30
If during meiosis, chromosmes fail to separate properly, this is called___
Gamete production
Diploid division
Mitosis
Nondisjuction
31
Eye color is influenced by several gene segments along DNA. This trait is known as ____.
monogenic
polygenic
dominant
recessive
32
The scientist known as the “Father of Genetics”
Robert Hooke
Gregor Mendel
Charles Darwin
Chris Evans
33
A plant Tt mates with a plant tt, predict what the offspring’s genotype ratio will be
2 TT : 2 tt ( or 1:1 )
4 Tt
2 Tt : 2 tt ( or 1:1 )
4 tt
34
For every inherited trait, an individual has ___ copies of a gene
2
1
4
23
35
A diagram that predicts the expected outcome of a cross by considering all possible combos is
Punnett square
probability
pedigree
trait
36
Gregor Mendel studied traits of _____.
dragons
mice
pea plants
dogs
37
One of 2 or more alternate forms of a gene located in the same place on the DNA, such as T or t
Phenotype
Alleles
Sex-linked trait
Genotype
38
The branch of biology that focuses on heredity.
Phenotype
Genetics
Genotype
Alleles
39
Diploid ( 2 n) means....
Original number of chromosomes in a cell.
Double the number of chromosomes in the original cell.
Half the number of chromosomes in the original cell
Mutated cell
40
What is result of meiosis?
4 sex cells, each with different combo of genetic material
4 identical daughter cells
4 sex cells, 2 male & 2 female
4 daughter cells, each with a different # of chromosomes
