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Concordia BIOL 226 Questions And Answers
Already Graded A+
Cross pollination vs. self pollination - .....ANSWER
...✔✔ Cross Pollination: These are flower that
receives pollen from another plant. Pollinators provide a
way to transfer pollen for flowers that must be cross-
pollinated.
Self Pollination: This is a plant that can pollinate itself or
another flower on the same plant.
Seven characters Mendel studied - .....ANSWER ...✔✔
-round or wrinkled ripe seeds
-yellow or green seeds
-purple or white petals
-inflated or pinched ripe pods
-green or yellow unriped pods
-axial or terminal flowers
-long or short stems
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True breeding lines - .....ANSWER ...✔✔ breeding
lines in which interbred members always produce
offspring with the same trait, generation after
generation
-homozygous
-selfing
Mendels experiment #1 - .....ANSWER ...✔✔
Evidence for a dual nature of genetic information
-took pollen from pea plants with wrinkled seeds and
put it on the stigma of flowers from plants with smooth
seeds
-all F1 seeds were smooth (dominant)
-crossed F1 smooth seed plants
-F2 progeny were not all smooth (3:1)
Monohybrid crosses - .....ANSWER ...✔✔ Crosses of
two varieties of true breeding plants that differed in
only one character
Ex. Seed shape or seed colour
-one trains was dominant and one trait was recessive
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Test cross - .....ANSWER ...✔✔ the crossing of an
individual of unknown genotype with a homozygous
recessive individual to determine the unknown genotype
-tester is always homozygous recessive to the alleles
being considered (virtue of being recessive, the tester
cannot hide the dominant allele the of the hybrid
segregating)
-used to follow segregation in the hybrid meiosis
Locus - .....ANSWER ...✔✔ Physical region in
chromosomes where genes are
Allele - .....ANSWER ...✔✔ Version of a gene that
occupies a locus
The first Mendelian law - .....ANSWER ...✔✔ Law of
segregation
-alleles of a gene separate independently from each
other during transmission from parent to offspring
(through meiosis)
-the dominant phenotype appears at 100% in the F1
(hybrid genotype)
-the phenotypic frequencies in F2 conforms to 3:1
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The principles of dominance (derivation of first law) -
.....ANSWER ...✔✔ In a heterozygote, one allele may
conceal the presence of another
The principles of segregation (derivation of first law) -
.....ANSWER ...✔✔ In a heterozygote, two different
alleles segregate from each other during the formation
of gametes
In a F2 progeny with 120 peas segregating yellow and
green seed colour, how many should be homozygous
and how many should be heterozygous for seed colour
information. - .....ANSWER ...✔✔ 60 should be
homozygous and 60 should be heterozygous
Which generation shows evidence for dominance?
Parental, F1 or F2 - .....ANSWER ...✔✔ F1
-will consist exclusively of heterozygotes displaying the
dominant phenotype for the allele combination in the
locus
Which generation directly provides evidence for the
independent segregation of alleles? Parental, F1 or F2 -
.....ANSWER ...✔✔ F2
Concordia BIOL 226 Questions And Answers
Already Graded A+
Cross pollination vs. self pollination - .....ANSWER
...✔✔ Cross Pollination: These are flower that
receives pollen from another plant. Pollinators provide a
way to transfer pollen for flowers that must be cross-
pollinated.
Self Pollination: This is a plant that can pollinate itself or
another flower on the same plant.
Seven characters Mendel studied - .....ANSWER ...✔✔
-round or wrinkled ripe seeds
-yellow or green seeds
-purple or white petals
-inflated or pinched ripe pods
-green or yellow unriped pods
-axial or terminal flowers
-long or short stems
,2|Page
True breeding lines - .....ANSWER ...✔✔ breeding
lines in which interbred members always produce
offspring with the same trait, generation after
generation
-homozygous
-selfing
Mendels experiment #1 - .....ANSWER ...✔✔
Evidence for a dual nature of genetic information
-took pollen from pea plants with wrinkled seeds and
put it on the stigma of flowers from plants with smooth
seeds
-all F1 seeds were smooth (dominant)
-crossed F1 smooth seed plants
-F2 progeny were not all smooth (3:1)
Monohybrid crosses - .....ANSWER ...✔✔ Crosses of
two varieties of true breeding plants that differed in
only one character
Ex. Seed shape or seed colour
-one trains was dominant and one trait was recessive
,3|Page
Test cross - .....ANSWER ...✔✔ the crossing of an
individual of unknown genotype with a homozygous
recessive individual to determine the unknown genotype
-tester is always homozygous recessive to the alleles
being considered (virtue of being recessive, the tester
cannot hide the dominant allele the of the hybrid
segregating)
-used to follow segregation in the hybrid meiosis
Locus - .....ANSWER ...✔✔ Physical region in
chromosomes where genes are
Allele - .....ANSWER ...✔✔ Version of a gene that
occupies a locus
The first Mendelian law - .....ANSWER ...✔✔ Law of
segregation
-alleles of a gene separate independently from each
other during transmission from parent to offspring
(through meiosis)
-the dominant phenotype appears at 100% in the F1
(hybrid genotype)
-the phenotypic frequencies in F2 conforms to 3:1
, 4|Page
The principles of dominance (derivation of first law) -
.....ANSWER ...✔✔ In a heterozygote, one allele may
conceal the presence of another
The principles of segregation (derivation of first law) -
.....ANSWER ...✔✔ In a heterozygote, two different
alleles segregate from each other during the formation
of gametes
In a F2 progeny with 120 peas segregating yellow and
green seed colour, how many should be homozygous
and how many should be heterozygous for seed colour
information. - .....ANSWER ...✔✔ 60 should be
homozygous and 60 should be heterozygous
Which generation shows evidence for dominance?
Parental, F1 or F2 - .....ANSWER ...✔✔ F1
-will consist exclusively of heterozygotes displaying the
dominant phenotype for the allele combination in the
locus
Which generation directly provides evidence for the
independent segregation of alleles? Parental, F1 or F2 -
.....ANSWER ...✔✔ F2
