Biology 1400 Exam 3 | Actual Exam
Questions | 100% Correct Answers |
Verified 2024 Version
Each body cell has the same genes, but cells differ from each other because different genes are
_________ in each cell type. - ✔✔expressed
Different versions of the same gene are called _______ and these different versions are produced by
_________ - ✔✔alleles; mutation
A child carries one copy of each _______ from each of his parents. - ✔✔gene
Each egg produced by a woman differs genetically from her other eggs because of the ________
_________ of genes into gametes during meiosis. - ✔✔independent assortment
That any sperm can theoretically fertilize any egg when two individuals pair is referred to as _______
fertilization, which creates diversity in offspring. - ✔✔random
The genetic composition of an individual - ✔✔genotype
Physical traits - ✔✔phenotype
The combination of alleles an individual possesses is referred to as his or her ________, whereas his or
her outward appearance or function resulting from genetic composition is called his or her _________. -
✔✔genotype; phenotype
An allele that is expressed even when an individual carries only one copy is referred to as __________ -
✔✔dominant
, An individual who carries two different alleles for the same gene is referred to as a __________ for that
gene. - ✔✔heterozygote
In a cross between two heterozygotes, an offspring carrying two copies of the recessive allele is expected
to occur _____ percent of the time. - ✔✔25%
Predicting the likelihood of a particular genotype from a cross between two heterozygotes for two
different genes requires a Punnet square with ______ boxes. - ✔✔16
incomplete dominance - ✔✔A mixture of the alleles in the genotype is seen in the phenotype. Mixture
of the two heterozygous alleles. ex. Rb produces a purple flower.
Codominance - ✔✔Both alleles seen in the genotype are present in the phenotype. Both heterozygous
traits are present but separate. Ex. Rb produces a flower with some red petals and some with blue
petals.
complete dominance - ✔✔Only one allele seen in the genotype is present in the phenotype. Ex. Rb
produces red flower petals because the red trait is dominant over the blue recessive trait.
When a heterozygote has a phenotype intermediate between two homozygotes, the allele is said to be
_____ dominant - ✔✔incompletely
In sickle cell anemia, the disease-causing allele is not nonfunctional, it is present in ______ form. -
✔✔mutated
The alleles that determine A and B blood type are best described as _________, meaning that both are
expressed in the heterozygote. - ✔✔mutated
The ABO blood system also displays another common phenomenon- that any gene may have more than
________ alleles. - ✔✔two
Individuals with type O blood carry two copies of the __________ allele for blood type. - ✔✔recessive
Questions | 100% Correct Answers |
Verified 2024 Version
Each body cell has the same genes, but cells differ from each other because different genes are
_________ in each cell type. - ✔✔expressed
Different versions of the same gene are called _______ and these different versions are produced by
_________ - ✔✔alleles; mutation
A child carries one copy of each _______ from each of his parents. - ✔✔gene
Each egg produced by a woman differs genetically from her other eggs because of the ________
_________ of genes into gametes during meiosis. - ✔✔independent assortment
That any sperm can theoretically fertilize any egg when two individuals pair is referred to as _______
fertilization, which creates diversity in offspring. - ✔✔random
The genetic composition of an individual - ✔✔genotype
Physical traits - ✔✔phenotype
The combination of alleles an individual possesses is referred to as his or her ________, whereas his or
her outward appearance or function resulting from genetic composition is called his or her _________. -
✔✔genotype; phenotype
An allele that is expressed even when an individual carries only one copy is referred to as __________ -
✔✔dominant
, An individual who carries two different alleles for the same gene is referred to as a __________ for that
gene. - ✔✔heterozygote
In a cross between two heterozygotes, an offspring carrying two copies of the recessive allele is expected
to occur _____ percent of the time. - ✔✔25%
Predicting the likelihood of a particular genotype from a cross between two heterozygotes for two
different genes requires a Punnet square with ______ boxes. - ✔✔16
incomplete dominance - ✔✔A mixture of the alleles in the genotype is seen in the phenotype. Mixture
of the two heterozygous alleles. ex. Rb produces a purple flower.
Codominance - ✔✔Both alleles seen in the genotype are present in the phenotype. Both heterozygous
traits are present but separate. Ex. Rb produces a flower with some red petals and some with blue
petals.
complete dominance - ✔✔Only one allele seen in the genotype is present in the phenotype. Ex. Rb
produces red flower petals because the red trait is dominant over the blue recessive trait.
When a heterozygote has a phenotype intermediate between two homozygotes, the allele is said to be
_____ dominant - ✔✔incompletely
In sickle cell anemia, the disease-causing allele is not nonfunctional, it is present in ______ form. -
✔✔mutated
The alleles that determine A and B blood type are best described as _________, meaning that both are
expressed in the heterozygote. - ✔✔mutated
The ABO blood system also displays another common phenomenon- that any gene may have more than
________ alleles. - ✔✔two
Individuals with type O blood carry two copies of the __________ allele for blood type. - ✔✔recessive
