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bio 1201 gregg exam 3 Questions With 100%
Correct Answers.
the units of heredity and are made up of segments of
DNA - .....ANSWER ...✔✔ genes
how many chromosomes do humans have in the nucleus
of their somatic cells? - .....ANSWER ...✔✔ 46
chromosomes (23 pairs)
the two chromosomes in each pair are called... -
.....ANSWER ...✔✔ homologous
chromosomes/homologs
each pair of homologous chromosomes includes... -
.....ANSWER ...✔✔ one chromosome from each parent
what does meiosis result in - .....ANSWER ...✔✔ 4
haploid daughter cells
what does meiosis 1 do - .....ANSWER ...✔✔
separates homologous chromosomes
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when does crossing over and synapsis occur -
.....ANSWER ...✔✔ prophase 1
what does meiosis 2 do - .....ANSWER ...✔✔
separates sister chromatids
mitosis vs meiosis - .....ANSWER ...✔✔ Mitosis: one
division forming 2 identical cells (clones); Meiosis: two
divisions forming 4 genetically different cells
meiosis 2 is similar to mitosis because... - .....ANSWER
...✔✔ sister chromatids separate
how do different alleles occur - .....ANSWER ...✔✔
through mutation
what 3 things contribute to genetic variation -
.....ANSWER ...✔✔ crossing over, independent
assortment, random fertilization
when does independent assortment occur? - .....ANSWER
...✔✔ metaphase I of meiosis
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random fertilization - .....ANSWER ...✔✔ any sperm
can fertilize any egg
the mating of 2 true-breeding varieties - .....ANSWER
...✔✔ hybridization
p generation - .....ANSWER ...✔✔ true-breeding
parents
f1 generation - .....ANSWER ...✔✔ hybrid offspring
of the P generation
f2 generation - .....ANSWER ...✔✔ offspring of the F1
generation
alternative versions of a gene - .....ANSWER ...✔✔
alleles
the specific spot where a gene resides on a chromosome
- .....ANSWER ...✔✔ locus
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two alleles for a heritable character separate during
gamete formation and end up in different gametes -
.....ANSWER ...✔✔ law of segregation
organism with two identical alleles for a character -
.....ANSWER ...✔✔ homozygote
organism with two different alleles for a gene -
.....ANSWER ...✔✔ heterozygote
to determine the genotype, breed the mystery individual
with a homozygous recessive individual - .....ANSWER
...✔✔ testcross
crossing two true-breeding parents differing in two
characters produces ______ in the F1 generation,
heterozygous for both characters - .....ANSWER ...✔✔
dihybrids
a cross between F1 which can determine whether two
characters are transmitted to offspring as a package or
independently is called? - .....ANSWER ...✔✔ a
dihybrid cross
bio 1201 gregg exam 3 Questions With 100%
Correct Answers.
the units of heredity and are made up of segments of
DNA - .....ANSWER ...✔✔ genes
how many chromosomes do humans have in the nucleus
of their somatic cells? - .....ANSWER ...✔✔ 46
chromosomes (23 pairs)
the two chromosomes in each pair are called... -
.....ANSWER ...✔✔ homologous
chromosomes/homologs
each pair of homologous chromosomes includes... -
.....ANSWER ...✔✔ one chromosome from each parent
what does meiosis result in - .....ANSWER ...✔✔ 4
haploid daughter cells
what does meiosis 1 do - .....ANSWER ...✔✔
separates homologous chromosomes
,2|Page
when does crossing over and synapsis occur -
.....ANSWER ...✔✔ prophase 1
what does meiosis 2 do - .....ANSWER ...✔✔
separates sister chromatids
mitosis vs meiosis - .....ANSWER ...✔✔ Mitosis: one
division forming 2 identical cells (clones); Meiosis: two
divisions forming 4 genetically different cells
meiosis 2 is similar to mitosis because... - .....ANSWER
...✔✔ sister chromatids separate
how do different alleles occur - .....ANSWER ...✔✔
through mutation
what 3 things contribute to genetic variation -
.....ANSWER ...✔✔ crossing over, independent
assortment, random fertilization
when does independent assortment occur? - .....ANSWER
...✔✔ metaphase I of meiosis
,3|Page
random fertilization - .....ANSWER ...✔✔ any sperm
can fertilize any egg
the mating of 2 true-breeding varieties - .....ANSWER
...✔✔ hybridization
p generation - .....ANSWER ...✔✔ true-breeding
parents
f1 generation - .....ANSWER ...✔✔ hybrid offspring
of the P generation
f2 generation - .....ANSWER ...✔✔ offspring of the F1
generation
alternative versions of a gene - .....ANSWER ...✔✔
alleles
the specific spot where a gene resides on a chromosome
- .....ANSWER ...✔✔ locus
, 4|Page
two alleles for a heritable character separate during
gamete formation and end up in different gametes -
.....ANSWER ...✔✔ law of segregation
organism with two identical alleles for a character -
.....ANSWER ...✔✔ homozygote
organism with two different alleles for a gene -
.....ANSWER ...✔✔ heterozygote
to determine the genotype, breed the mystery individual
with a homozygous recessive individual - .....ANSWER
...✔✔ testcross
crossing two true-breeding parents differing in two
characters produces ______ in the F1 generation,
heterozygous for both characters - .....ANSWER ...✔✔
dihybrids
a cross between F1 which can determine whether two
characters are transmitted to offspring as a package or
independently is called? - .....ANSWER ...✔✔ a
dihybrid cross
