Portage learning genetics BIOD 210 module 2 exam questions and correct answers
Define karyotype a picture of all the chromosomes in a cell
A karyotype is made by isolating and
staining what, photographing them, and WBCs; cutting and arranging the image
then doing what?
What does a cytogeneticist do with a Examines for evidence of chromosomal
karyotype? abnormalities
Chromosomes are organized in a kary-
size
otype based on
Sickle cell anemia is caused by homozy-
gous or heterozygous inheritance? Is it Homozygous recessive
dominant or recessive?
Sickle cell defect is caused by a defect in
beta globulin in hemoglobin
which protein?
Under what conditions is sickle cell ane-
High altitude, low oxygen
mia exacerbated?
Which genetic mutation increases a pa-
BRCA
tient's risk of ovarian and breast cancer?
1. Easy to grow and breed
Why did Mendel use pea plants? 3 2. Self fertilize
3. Cross breed
Parent plant that produces offspring of
Define true breeding
the same variety every time
Parent generation, filial generation 1, fil-
P1, F1, F2 mean?
ial generation 2, etc.
two pure individual parental strains are
Define monohybrid cross mated that contrast only in the trait being
observed
If you cross a heterozygous tall plant with
75% tall, 25% dwarf
a dwarf plant, what offspring result?
What do we call unit factors now? Genes
1. Traits are controlled by unit factors that
exist in pairs in organisms
2. Unit factors are dominant or recessive
1/5
, Portage learning genetics BIOD 210 module 2 exam questions and correct answers
3. The two alleles in an individual remain
What are the four postulates on inheri-
independent, do not mix
tance?
4. Unit factors are randomly assorted
Dominant traits are expressed with
letters, and recessive traits Capital, lower case
are expressed with letters
If a homozygous dominant and homozy-
DD x dd = 100% Dd
gous recessive parent are bred, what
Dd x Dd = 25% DD, 50% Dd, 25% dd.
does the F1 generation produce? If an
75% tall, 25% short
F1 and F1 are crossed, what results?
What type of cells are chromosomes
Gametes
transmitted on?
Human suppressor gene that repairs
What does BRCA code for?
DNA in normal breast tissue
Define homozygous having two identical alleles of a gene
Define heterozygous having two different alleles of a gene
He bred the plant with a plant that had
How did Mendel determine the genotype a known homozygous recessive trait to
of a tall plant if he did know whether it determine whether the tall plant was DD
was homozygous dominant or heterozy- or Dd. if It was DD, all the offspring would
gous? be tall. If Dd, only some would be tall, and
some would be short
Testing a suspected heterozygote by
Define test cross crossing it with a known homozygous re-
cessive
crosses that examine the inheritance of
Define dihybrid cross
two different traits
If YYRR and yyrr mate what are the
100% YyRr, heterozygous
genotypes of F1 offspring
9:3:3:1 ratio:
If YyRr F1 crossed with another YyRr F1, 9 with all dominant traits
how can you quickly determine F2? 3 with recessive for one trait, 3 recessive
for the other
1 with all recessive traits
2/5
Define karyotype a picture of all the chromosomes in a cell
A karyotype is made by isolating and
staining what, photographing them, and WBCs; cutting and arranging the image
then doing what?
What does a cytogeneticist do with a Examines for evidence of chromosomal
karyotype? abnormalities
Chromosomes are organized in a kary-
size
otype based on
Sickle cell anemia is caused by homozy-
gous or heterozygous inheritance? Is it Homozygous recessive
dominant or recessive?
Sickle cell defect is caused by a defect in
beta globulin in hemoglobin
which protein?
Under what conditions is sickle cell ane-
High altitude, low oxygen
mia exacerbated?
Which genetic mutation increases a pa-
BRCA
tient's risk of ovarian and breast cancer?
1. Easy to grow and breed
Why did Mendel use pea plants? 3 2. Self fertilize
3. Cross breed
Parent plant that produces offspring of
Define true breeding
the same variety every time
Parent generation, filial generation 1, fil-
P1, F1, F2 mean?
ial generation 2, etc.
two pure individual parental strains are
Define monohybrid cross mated that contrast only in the trait being
observed
If you cross a heterozygous tall plant with
75% tall, 25% dwarf
a dwarf plant, what offspring result?
What do we call unit factors now? Genes
1. Traits are controlled by unit factors that
exist in pairs in organisms
2. Unit factors are dominant or recessive
1/5
, Portage learning genetics BIOD 210 module 2 exam questions and correct answers
3. The two alleles in an individual remain
What are the four postulates on inheri-
independent, do not mix
tance?
4. Unit factors are randomly assorted
Dominant traits are expressed with
letters, and recessive traits Capital, lower case
are expressed with letters
If a homozygous dominant and homozy-
DD x dd = 100% Dd
gous recessive parent are bred, what
Dd x Dd = 25% DD, 50% Dd, 25% dd.
does the F1 generation produce? If an
75% tall, 25% short
F1 and F1 are crossed, what results?
What type of cells are chromosomes
Gametes
transmitted on?
Human suppressor gene that repairs
What does BRCA code for?
DNA in normal breast tissue
Define homozygous having two identical alleles of a gene
Define heterozygous having two different alleles of a gene
He bred the plant with a plant that had
How did Mendel determine the genotype a known homozygous recessive trait to
of a tall plant if he did know whether it determine whether the tall plant was DD
was homozygous dominant or heterozy- or Dd. if It was DD, all the offspring would
gous? be tall. If Dd, only some would be tall, and
some would be short
Testing a suspected heterozygote by
Define test cross crossing it with a known homozygous re-
cessive
crosses that examine the inheritance of
Define dihybrid cross
two different traits
If YYRR and yyrr mate what are the
100% YyRr, heterozygous
genotypes of F1 offspring
9:3:3:1 ratio:
If YyRr F1 crossed with another YyRr F1, 9 with all dominant traits
how can you quickly determine F2? 3 with recessive for one trait, 3 recessive
for the other
1 with all recessive traits
2/5
