B.A.M.S Biology Cumulative (-Taxonomy)
UPDATED Exam Questions and
CORRECT Answers
Why did Gregor Mendel use peas in his experiments?
Peas grow very slowly.
Pea reproduction cannot be controlled.
Peas normally produce very few offspring.
Peas have characteristics that have two forms. - Correct Answer- Peas have characteristics
that have two forms.
Scientists often use fruit flies as a method to test hypotheses about human genes. Why are
fruit flies advantageous in the study of human inheritance?
They can self-pollinate.
They lack nucleic acids.
They are very different from humans.
They reproduce quickly and take up little space. - Correct Answer- They reproduce quickly
and take up little space.
A scientist wants to examine a genetic disease in humans. The scientist hypothesizes that the
disease can be treated by using gene therapy. Humans take a long time to reproduce and
develop, so the scientist will have to
give up on testing the hypothesis.
test the hypothesis for a very long time.
develop new methods to test the hypothesis.
find a way to make humans reproduce faster. - Correct Answer- develop new methods to test
the hypothesis.
What is a gene?
a section of a protein that codes for DNA
the alternate version of a trait
,the visible trait in the F1 generation
a section of DNA that codes for a specific trait - Correct Answer- a section of DNA that codes
for a specific trait
Some people have freckles, and some people do not have freckles. If a child has freckles, at
least one parent has freckles. However, the child may have a sibling that does not have
freckles. Which statement best describes the presence of freckles?
Freckles are not determined by DNA.
There are two alleles for freckles.
There is no dominant allele for freckles.
Freckles are determined by two genes instead of by one. - Correct Answer- There are two
alleles for freckles.
Nucleic acids offer variability because they contain alternate forms of genes called ________
- Correct Answer- alleles
Tall pea plants are dominant over short pea plants. If there are 200 short plants in the F2
generation from a cross that followed Mendel's methods, about how many plants will be tall
in that generation?
200
300
600
1,000 - Correct Answer- 600
A plant can produce either purple flowers or white flowers. What is the probability of purple-
flowered offspring if two plants that are heterozygous for purple flowers are crossed?
1:4
2:4
3:4
4:4 - Correct Answer- 3:4
Mendel crossed two plants that were heterozygous for purple flower color. Which genotypes
could he have used to represent the cross?
PP ´ PP
, Pp ´ Pp
pp ´ pp
Pp ´ PP - Correct Answer- Pp ´ Pp
Which term describes an organism that has identical alleles for a trait?
homozygous
heterozygous
dominant
recessive - Correct Answer- homozygous
Gregor Mendel crossed homozygous tall plants (TT) with homozygous short plants (tt). All
the resulting offspring were tall. From these results, what conclusion did Mendel draw?
Tallness is a dominant trait.
The word homozygous always means dominant.
Only dominant alleles are passed on to offspring.
The alleles of the offspring were recessive. - Correct Answer- Tallness is a dominant trait.
Why did Gregor Mendel study pea plants?
They exhibit only a single trait.
They produce flowers.
They are easy to grow.
They reproduce sexually. - Correct Answer- They reproduce sexually.
Purple flowers are dominant over white flowers. A heterozygous purple flower is crossed
with another heterozygous purple flower. The ratio of purple to white would be - Correct
Answer- 3:1
Which of Mendel's laws or principles states that gametes carry one allele for each trait?
principle of dominance
law of independent assortment
law of segregation
UPDATED Exam Questions and
CORRECT Answers
Why did Gregor Mendel use peas in his experiments?
Peas grow very slowly.
Pea reproduction cannot be controlled.
Peas normally produce very few offspring.
Peas have characteristics that have two forms. - Correct Answer- Peas have characteristics
that have two forms.
Scientists often use fruit flies as a method to test hypotheses about human genes. Why are
fruit flies advantageous in the study of human inheritance?
They can self-pollinate.
They lack nucleic acids.
They are very different from humans.
They reproduce quickly and take up little space. - Correct Answer- They reproduce quickly
and take up little space.
A scientist wants to examine a genetic disease in humans. The scientist hypothesizes that the
disease can be treated by using gene therapy. Humans take a long time to reproduce and
develop, so the scientist will have to
give up on testing the hypothesis.
test the hypothesis for a very long time.
develop new methods to test the hypothesis.
find a way to make humans reproduce faster. - Correct Answer- develop new methods to test
the hypothesis.
What is a gene?
a section of a protein that codes for DNA
the alternate version of a trait
,the visible trait in the F1 generation
a section of DNA that codes for a specific trait - Correct Answer- a section of DNA that codes
for a specific trait
Some people have freckles, and some people do not have freckles. If a child has freckles, at
least one parent has freckles. However, the child may have a sibling that does not have
freckles. Which statement best describes the presence of freckles?
Freckles are not determined by DNA.
There are two alleles for freckles.
There is no dominant allele for freckles.
Freckles are determined by two genes instead of by one. - Correct Answer- There are two
alleles for freckles.
Nucleic acids offer variability because they contain alternate forms of genes called ________
- Correct Answer- alleles
Tall pea plants are dominant over short pea plants. If there are 200 short plants in the F2
generation from a cross that followed Mendel's methods, about how many plants will be tall
in that generation?
200
300
600
1,000 - Correct Answer- 600
A plant can produce either purple flowers or white flowers. What is the probability of purple-
flowered offspring if two plants that are heterozygous for purple flowers are crossed?
1:4
2:4
3:4
4:4 - Correct Answer- 3:4
Mendel crossed two plants that were heterozygous for purple flower color. Which genotypes
could he have used to represent the cross?
PP ´ PP
, Pp ´ Pp
pp ´ pp
Pp ´ PP - Correct Answer- Pp ´ Pp
Which term describes an organism that has identical alleles for a trait?
homozygous
heterozygous
dominant
recessive - Correct Answer- homozygous
Gregor Mendel crossed homozygous tall plants (TT) with homozygous short plants (tt). All
the resulting offspring were tall. From these results, what conclusion did Mendel draw?
Tallness is a dominant trait.
The word homozygous always means dominant.
Only dominant alleles are passed on to offspring.
The alleles of the offspring were recessive. - Correct Answer- Tallness is a dominant trait.
Why did Gregor Mendel study pea plants?
They exhibit only a single trait.
They produce flowers.
They are easy to grow.
They reproduce sexually. - Correct Answer- They reproduce sexually.
Purple flowers are dominant over white flowers. A heterozygous purple flower is crossed
with another heterozygous purple flower. The ratio of purple to white would be - Correct
Answer- 3:1
Which of Mendel's laws or principles states that gametes carry one allele for each trait?
principle of dominance
law of independent assortment
law of segregation
