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RIO BIO 156 (ACTUAL 2025/2026) EXAM 2 WITH
COMPLETE SOLUTIONS
Interphase is the stage when __________. - (answer)a cell grows and duplicates
its DNA.
In an individual with a dominant phenotype is crossed with an individual with a
recessive phenotype, 4 of their 9 offspring show the recessive phenotype. What is
the genotype of the first parent? - (answer)Bb
Solve this monohybrid genetics problem: Black hair is governed by the dominant
gene (B) and blond hair is determined by the recessive gene (b). In this
monohybrid cross, if both parents are heterozygous, what percentage of the
offspring would be expected to have blond hair? - (answer)25%
A Punnett square can be used to determine___________. - (answer)the genotype
of an offspring
Different alleles of the same gene are found - (answer)at the same place on
homologous chromosomes
If a parental cell has 14 chromosomes prior to mitosis, how many chromosomes
will each daughter cell have? - (answer)14 because the chromatids separate
a duplicated chromosome has _____ chromatid(s) - (answer)2
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Mendel was fortunate to work out the laws of segregation and independent
assortment because he used an organism that reproduced quickly and in which
the traits were discrete (easy to observe). Mendel's organism of choice was the -
(answer)pea plant
What is the importance of crossing-over? - (answer)It increases the likelihood
that daughter cells contain different genetic material.
Assuming that the probability of having a female child is 50% and the probability
of having a male child is also 50%, what is the probability that a couple's firstborn
child is female and second-born child is male? - (answer)25%
If a parental cell has 12 chromosomes, then each of the daughter cells following
meiosis will have _____. - (answer)6 chromosomes.
Which of the following genotypes would be homozygous dominant for both
alleles? - (answer)DDEE
Which sequence of stages in mitosis is correct? - (answer)prophase,
prometaphase, metaphase, anaphase, telophase
During which stage of meiosis does crossing-over occur? - (answer)prophase I
Which occurs in anaphase? - (answer)Chromosomes move to opposite poles.
RIO BIO 156 (ACTUAL 2025/2026) EXAM 2 WITH
COMPLETE SOLUTIONS
Interphase is the stage when __________. - (answer)a cell grows and duplicates
its DNA.
In an individual with a dominant phenotype is crossed with an individual with a
recessive phenotype, 4 of their 9 offspring show the recessive phenotype. What is
the genotype of the first parent? - (answer)Bb
Solve this monohybrid genetics problem: Black hair is governed by the dominant
gene (B) and blond hair is determined by the recessive gene (b). In this
monohybrid cross, if both parents are heterozygous, what percentage of the
offspring would be expected to have blond hair? - (answer)25%
A Punnett square can be used to determine___________. - (answer)the genotype
of an offspring
Different alleles of the same gene are found - (answer)at the same place on
homologous chromosomes
If a parental cell has 14 chromosomes prior to mitosis, how many chromosomes
will each daughter cell have? - (answer)14 because the chromatids separate
a duplicated chromosome has _____ chromatid(s) - (answer)2
, 2|Page
Mendel was fortunate to work out the laws of segregation and independent
assortment because he used an organism that reproduced quickly and in which
the traits were discrete (easy to observe). Mendel's organism of choice was the -
(answer)pea plant
What is the importance of crossing-over? - (answer)It increases the likelihood
that daughter cells contain different genetic material.
Assuming that the probability of having a female child is 50% and the probability
of having a male child is also 50%, what is the probability that a couple's firstborn
child is female and second-born child is male? - (answer)25%
If a parental cell has 12 chromosomes, then each of the daughter cells following
meiosis will have _____. - (answer)6 chromosomes.
Which of the following genotypes would be homozygous dominant for both
alleles? - (answer)DDEE
Which sequence of stages in mitosis is correct? - (answer)prophase,
prometaphase, metaphase, anaphase, telophase
During which stage of meiosis does crossing-over occur? - (answer)prophase I
Which occurs in anaphase? - (answer)Chromosomes move to opposite poles.
