GN 311 EXAM 1 QUESTIONS WITH VERIFIED
ANSWERS
An organism is described as 2n = 52.
How many chromosomes are in one mitotic cell during metaphase? - Answers - 52
An organism is described as 2n = 52.
How many chromosomes are in one mitotic cell during telophase? - Answers - 104
An organism is described as 2n = 52.
How many chromosomes are in one meiotic cell during prophase 1? - Answers - 52
An organism is described as 2n = 52.
How many chromatids per chromosome are in one meiotic cell during metaphase 1? -
Answers - 2
In cucumbers:
Dull fruit (D) is dominant to glossy (d)
Orange fruit (R) is dominant to cream (r)
Bitter cotyledons (B) are dominant to nonbitter (b)
A cucumber with the genotype ddRrBb was crossed to a cucumber with the genotype
DdRrBb
using a branch diagram, determine the probability that an offspring from this cross will
be glossy and cream with bitter cotelydons? (Type in as a decimal and round to 6
decimal digits.) - Answers - 0.09375
How many different gametes does a parent with the following genotype produce?
AA Bb Dd Ee - Answers - 8
How many different genotypes are found among the progeny of the cross listed below?
Aa Bb dd Ee x Aa BB DD Ee - Answers - 18
How many different phenotypes are found among the progeny of the cross listed below?
,AA BB Dd Ee x aa bb Dd ee - Answers - 4
What is the probability that the first offspring from the cross listed below will be
heterozygous for all loci? (type as a decimal and round to 5 decimal places)
AA bb Dd ee x aa Bb Dd EE - Answers - 0.25
What is the probability that the first offspring from this cross:
Aa bb Dd Ee x AA bb Dd Ee
will be a son with the genotype:
Aa bb DD ee
Type your answer as a decimal and round to 6 decimal places. - Answers - 0.015625
In Smurfs, dwarf (T) is dominant to tall (t), pink (B) is dominant to blue (b), and happy
(G) is dominant to gloomy (g). All loci are autosomal and not linked. The phenotypes of
parents and their progeny are given for several crosses below. Determine the most
likely genotypes for each parent.
Female Parent Phenotype: Dwarf, Pink, Happy
Male Parent Phenotype: Dwarf, Blue, Gloomy
Progeny Numbers and Phenotypes: 88 Dwarf, Pink, Happy
92 Dwarf, Pink, Gloomy
33 Tall, Pink, Happy
27 Tall, Pink, Gloomy
Female Parent Genotype:
Height Locus:
Color Locus:
Disposition Locus:
Male Parent Genotype:
Height Locus:
Color Locus:
Disposition Locus: - Answers - Female Parent Genotype:
Height Locus: Tt
Color Locus: BB
Disposition Locus: Gg
Male Parent Genotype:
Height Locus: Tt
Color Locus: bb
Disposition Locus: gg
, We think that dwarfism in river birch might be a simple Mendelian trait. We have taken a
pure breeding normal plant and crossed it with a a pure breeding dwarf plant. The
resulting F1 plants were normal height. The F1 plants were selfed and the F2 data is
presented below:
Normal River Birch 806
Dwarf River Birch 272
Perform a chi square analysis on this data using the following hypothesis:
The mode of inheritance for height in river birch is simple Mendelian.
What is the calculated chi-square value? Round to three decimal places. - Answers -
.031
An organism is described as 2n = 18.
How many chromatids per chromosome are in one mitotic cell during anaphase? -
Answers - 1
An organism is described as 2n = 18.
How many chromatids per chromosome are in one meiotic cell during Anaphase 1? -
Answers - 2
An organism is described as 2n = 18.
How many chromatids per chromosome are in one mitotic cell during metaphase? -
Answers - 2
An organism is described as 2n = 18.
How many chromatids per chromosome are in one mitotic cell during telophase? -
Answers - 1
In cucumbers:
Dull fruit (D) is dominant to glossy (d)
Orange fruit (R) is dominant to cream (r)
Bitter cotyledons (B) are dominant to nonbitter (b)
A cucumber with the genotype ddRrBb was crossed to a cucumber with the genotype
DdRrBb
ANSWERS
An organism is described as 2n = 52.
How many chromosomes are in one mitotic cell during metaphase? - Answers - 52
An organism is described as 2n = 52.
How many chromosomes are in one mitotic cell during telophase? - Answers - 104
An organism is described as 2n = 52.
How many chromosomes are in one meiotic cell during prophase 1? - Answers - 52
An organism is described as 2n = 52.
How many chromatids per chromosome are in one meiotic cell during metaphase 1? -
Answers - 2
In cucumbers:
Dull fruit (D) is dominant to glossy (d)
Orange fruit (R) is dominant to cream (r)
Bitter cotyledons (B) are dominant to nonbitter (b)
A cucumber with the genotype ddRrBb was crossed to a cucumber with the genotype
DdRrBb
using a branch diagram, determine the probability that an offspring from this cross will
be glossy and cream with bitter cotelydons? (Type in as a decimal and round to 6
decimal digits.) - Answers - 0.09375
How many different gametes does a parent with the following genotype produce?
AA Bb Dd Ee - Answers - 8
How many different genotypes are found among the progeny of the cross listed below?
Aa Bb dd Ee x Aa BB DD Ee - Answers - 18
How many different phenotypes are found among the progeny of the cross listed below?
,AA BB Dd Ee x aa bb Dd ee - Answers - 4
What is the probability that the first offspring from the cross listed below will be
heterozygous for all loci? (type as a decimal and round to 5 decimal places)
AA bb Dd ee x aa Bb Dd EE - Answers - 0.25
What is the probability that the first offspring from this cross:
Aa bb Dd Ee x AA bb Dd Ee
will be a son with the genotype:
Aa bb DD ee
Type your answer as a decimal and round to 6 decimal places. - Answers - 0.015625
In Smurfs, dwarf (T) is dominant to tall (t), pink (B) is dominant to blue (b), and happy
(G) is dominant to gloomy (g). All loci are autosomal and not linked. The phenotypes of
parents and their progeny are given for several crosses below. Determine the most
likely genotypes for each parent.
Female Parent Phenotype: Dwarf, Pink, Happy
Male Parent Phenotype: Dwarf, Blue, Gloomy
Progeny Numbers and Phenotypes: 88 Dwarf, Pink, Happy
92 Dwarf, Pink, Gloomy
33 Tall, Pink, Happy
27 Tall, Pink, Gloomy
Female Parent Genotype:
Height Locus:
Color Locus:
Disposition Locus:
Male Parent Genotype:
Height Locus:
Color Locus:
Disposition Locus: - Answers - Female Parent Genotype:
Height Locus: Tt
Color Locus: BB
Disposition Locus: Gg
Male Parent Genotype:
Height Locus: Tt
Color Locus: bb
Disposition Locus: gg
, We think that dwarfism in river birch might be a simple Mendelian trait. We have taken a
pure breeding normal plant and crossed it with a a pure breeding dwarf plant. The
resulting F1 plants were normal height. The F1 plants were selfed and the F2 data is
presented below:
Normal River Birch 806
Dwarf River Birch 272
Perform a chi square analysis on this data using the following hypothesis:
The mode of inheritance for height in river birch is simple Mendelian.
What is the calculated chi-square value? Round to three decimal places. - Answers -
.031
An organism is described as 2n = 18.
How many chromatids per chromosome are in one mitotic cell during anaphase? -
Answers - 1
An organism is described as 2n = 18.
How many chromatids per chromosome are in one meiotic cell during Anaphase 1? -
Answers - 2
An organism is described as 2n = 18.
How many chromatids per chromosome are in one mitotic cell during metaphase? -
Answers - 2
An organism is described as 2n = 18.
How many chromatids per chromosome are in one mitotic cell during telophase? -
Answers - 1
In cucumbers:
Dull fruit (D) is dominant to glossy (d)
Orange fruit (R) is dominant to cream (r)
Bitter cotyledons (B) are dominant to nonbitter (b)
A cucumber with the genotype ddRrBb was crossed to a cucumber with the genotype
DdRrBb
