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