BIO 1050 EXAM 4 | VERIFIED STUDY | QUESTIONS AND
ANSWERS | 2026 UPDATES
Of the following , after the oviduct, either a human unfertilized egg or a zygote would next be in
- ANSWER- the uterus
Which of the following is a bacterial sexually transmitted disease, and therefore treatable with
antibiotics? - ANSWER- gonorrhea
Homologous chromosomes are two chromosomes of the same type. Homologous
chromosomes - ANSWER- are similar, but not exactly the same because one came from
mom and the other from dad.
Flower position is Mendelian. Axial flowers (A) are dominant to terminal flowers (a). In a
monohybrid cross of a plant with axial flowers to a plant with terminal flowers, the F2
generation would have a phenotype ratio of - ANSWER- 3 axial-flower plants : 1 terminal-
flower plant
On average, in a Mendelian monohybrid cross the F2 generation has plants that - ANSWER-
are 75% dominant phenotype and 25% recessive phenotype.
During human childbirth - ANSWER- All of the other answers are correct
Which of the following is most likely to increase the diversity of alleles in a population? -
ANSWER- gene flow due to new individuals joining the population
People with the IAIB genotype have type AB blood, not type A, not type B and not some type
half way between. This feature of blood type is an example of - ANSWER- codominance.
Bacteria are becoming resistant to antibiotics, such as methicillin. This increase in the number of
antibiotic-resistant bacteria is due to - ANSWER-
Assume Mendelian genetics for this question. Yellow seed color (Y) is dominant to green seeds
(y). If a YY plant is crossed to a yy plant in the parental generation, the F1 plants will have a
____________ phenotype, and a ______ genotype. - ANSWER- yellow seed,Yy
Which type of contraception also gives some protection against sexually transmitted diseases? -
ANSWER- latex condoms
, You start with a population with an allele frequency of 50% G and 50% g, and the individuals
breed randomly and there is no selection for or against G or g. After 100 generations, you would
expect the allele frequency to be - ANSWER- 50% G and 50% g
In Labrador retriever dogs, black coat (B) is dominant to a chocolate coat (b), and coat color is
inherited in a Mendelian pattern. You have a black lab dog and want to know if it is
heterozygous or homozygous. You breed your black lab with a chocolate lab to find out. Which
result below is consistent with your black lab being heterozygous? - ANSWER- half of the
puppies are black
Axial flowers (A) are dominant to terminal flowers (a) and Mendelian. On average, a
monohybrid cross of AA plants crossed to aa plants in the P generation would lead to a
genotype ratio in the F2 generation of - ANSWER- 1 AA : 2 Aa : 1 aa
A polygenic trait - ANSWER- is a phenotype that is affected by more than one gene.
Assume Mendelian inheritance for this question. If you cross a tall plant with homozygous
dominant genotype TT to a short plant with homozygous recessive genotype tt, the offspring of
that cross would have the genotype ratio of - ANSWER- all Tt
Assume a Mendelian character for cricket leg length for this question. There is a population of
1000 crickets. 500 of the crickets are heterozygous for leg length, and 500 are homozygous for
long-legs. Long legs are recessive. What is the phenotype frequency of long legs in this
population of crickets? - ANSWER- 50%
Which of the following is NOT evidence for evolution? - ANSWER- a dog with plenty of
food gets fatter than a dog with scarce food
Consider a Mendelian characteristic of flower color, with purple (P) and white (p) traits. If a
plant is homozygous dominant for flower color, then you would expect the gametes from that
plant to be - ANSWER- all P
If you claim two plants are the same species based on the basis of them having a common
ancestor, you are using the _____________ definition of a species. - ANSWER-
phylogenetic
Which of the following does NOT change the allele combinations in a population? - ANSWER-
mitosis
What is an advantage of sexual reproduction compared to asexual reproduction? - ANSWER-
it generates genetic diversity
ANSWERS | 2026 UPDATES
Of the following , after the oviduct, either a human unfertilized egg or a zygote would next be in
- ANSWER- the uterus
Which of the following is a bacterial sexually transmitted disease, and therefore treatable with
antibiotics? - ANSWER- gonorrhea
Homologous chromosomes are two chromosomes of the same type. Homologous
chromosomes - ANSWER- are similar, but not exactly the same because one came from
mom and the other from dad.
Flower position is Mendelian. Axial flowers (A) are dominant to terminal flowers (a). In a
monohybrid cross of a plant with axial flowers to a plant with terminal flowers, the F2
generation would have a phenotype ratio of - ANSWER- 3 axial-flower plants : 1 terminal-
flower plant
On average, in a Mendelian monohybrid cross the F2 generation has plants that - ANSWER-
are 75% dominant phenotype and 25% recessive phenotype.
During human childbirth - ANSWER- All of the other answers are correct
Which of the following is most likely to increase the diversity of alleles in a population? -
ANSWER- gene flow due to new individuals joining the population
People with the IAIB genotype have type AB blood, not type A, not type B and not some type
half way between. This feature of blood type is an example of - ANSWER- codominance.
Bacteria are becoming resistant to antibiotics, such as methicillin. This increase in the number of
antibiotic-resistant bacteria is due to - ANSWER-
Assume Mendelian genetics for this question. Yellow seed color (Y) is dominant to green seeds
(y). If a YY plant is crossed to a yy plant in the parental generation, the F1 plants will have a
____________ phenotype, and a ______ genotype. - ANSWER- yellow seed,Yy
Which type of contraception also gives some protection against sexually transmitted diseases? -
ANSWER- latex condoms
, You start with a population with an allele frequency of 50% G and 50% g, and the individuals
breed randomly and there is no selection for or against G or g. After 100 generations, you would
expect the allele frequency to be - ANSWER- 50% G and 50% g
In Labrador retriever dogs, black coat (B) is dominant to a chocolate coat (b), and coat color is
inherited in a Mendelian pattern. You have a black lab dog and want to know if it is
heterozygous or homozygous. You breed your black lab with a chocolate lab to find out. Which
result below is consistent with your black lab being heterozygous? - ANSWER- half of the
puppies are black
Axial flowers (A) are dominant to terminal flowers (a) and Mendelian. On average, a
monohybrid cross of AA plants crossed to aa plants in the P generation would lead to a
genotype ratio in the F2 generation of - ANSWER- 1 AA : 2 Aa : 1 aa
A polygenic trait - ANSWER- is a phenotype that is affected by more than one gene.
Assume Mendelian inheritance for this question. If you cross a tall plant with homozygous
dominant genotype TT to a short plant with homozygous recessive genotype tt, the offspring of
that cross would have the genotype ratio of - ANSWER- all Tt
Assume a Mendelian character for cricket leg length for this question. There is a population of
1000 crickets. 500 of the crickets are heterozygous for leg length, and 500 are homozygous for
long-legs. Long legs are recessive. What is the phenotype frequency of long legs in this
population of crickets? - ANSWER- 50%
Which of the following is NOT evidence for evolution? - ANSWER- a dog with plenty of
food gets fatter than a dog with scarce food
Consider a Mendelian characteristic of flower color, with purple (P) and white (p) traits. If a
plant is homozygous dominant for flower color, then you would expect the gametes from that
plant to be - ANSWER- all P
If you claim two plants are the same species based on the basis of them having a common
ancestor, you are using the _____________ definition of a species. - ANSWER-
phylogenetic
Which of the following does NOT change the allele combinations in a population? - ANSWER-
mitosis
What is an advantage of sexual reproduction compared to asexual reproduction? - ANSWER-
it generates genetic diversity
