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WorksheetsTest: Intro to Genetics
Total questions: 20
Worksheet time: 11mins
A change in the genetic material of a cell due to a mistake is called...
epigenetics
a mutation
a codon
an allele
What are mutagens?
Things that can alter the expression of a gene
Things that can cause a mutation, such as x-rays
Errors in DNA or RNA that cause a frameshift mutation
Errors in transcription that lead to a missense mutation
_ is the study of biological inheritance.
Traits
Mendelian
Genetics
Characteristics
The process in which male and female gametes join to form a new cell
meiosis
mitosis
acquisition
fertilization
The different forms of a single gene (such as H for hitchhiker's thumb or h for straight thumb) are known as...
alleles
genomics
genomes
genetics
Mendel's principle of dominance states that...
Recessive alleles will be expressed in the organism's body.
Dominant alleles will be expressed in the organism's body.
Sometimes parents are homoygous.
Sometimes parents are heterozygous.
The 1st generation of self-pollinating pea plants, which Mendel cross-pollinated, is referred to as the...
P generation
F generation
F1 generation
F2 generation
The generation that was produced by Mendel cross-pollinating pure, true-breeding pea plants, is referred to as the...
P generation
F generation
F1 generation
F2 generation
The generation that was produced when Mendel let the F1 generation self-pollinate is referred to as the...
P generation
F generation
F1 generation
F2 generation
True or False:
Mendel's P generation were all homozygous for their traits, having either both dominant or both recessive alleles.
True
False
Mendel's F1 generation...
were all homozygous.
were all hybrids, and exhibited the dominant trait.
were all hybrids, and exhibited the recessive trait.
all had white flowers, and no purple flowers.
In Mendel's studies, the recessive trait _ in the F1 generation of pea plants, and _ in the F2 generation.
disappeared,
reappeared
reappeared,
disappeared
appeared,
was hidden
became dominant,
became recessive
In Mendel's F2 generation of pea plants, what was the ratio of expression of dominant vs recessive traits?
1:2
(or 1/2 dominant and 1/2 recessive)
3:1
(or 3/4 dominant and 1/4 recessive)
1:3
(or 1/4 dominant and 3/4 recessive)
They all exhibited the dominant trait.
Organisms that have the same alleles for a gene (such as aa or AA) are _, also known as _.
heterozygous,
hybrid
homozygous,
hybrid
heterozygous,
pure
homozygous,
pure
Organisms that have different alleles for a gene (such as Aa) are _, also known as _.
heterozygous,
hybrid
homozygous,
hybrid
heterozygous,
pure
homozygous,
pure
Phenotype is _,
but genotype is _.
genetic makeup,
physical traits
physical traits,
genetic makeup
same alleles,
different alleles
different alleles,
same alleles
If C is the allele for cleft chin,
and c is the allele for no cleft,
what is the probability that parents with genotypes Cc and Cc will have a baby with no cleft?
none, or 0%
1/4, or 25%
1/2, or 50%
3/4, or 75%
If R is the allele for right-handedness,
and r is the allele for left-handedness,
what is the probability that parents with genotypes Rr and rr will have a baby who is left-handed?
none, or 0%
1/4, or 25%
1/2, or 50%
3/4, or 75%
Which of Mendel's ideas describes how alleles separate during meiosis, so each gamete has only one copy of each allele?
the principle of inheritance
the principle of dominance
the law of segregation
the law of independent assortment
Which of Mendel's ideas describes how traits are unrelated, passed down to the next generation with no influence on other traits?
the principle of inheritance
the principle of dominance
the law of segregation
the law of independent assortment
