RIO BIO 156 COMPREHENSIVE MIDTERM
TEST PAPER 2026 DETAILED QUESTIONS
AND THOROUGHLY REVIEWED
ACCURATE SOLUTIONS GRADED A+
⩥ The expression of both alleles for a trait in a heterozygous individual
illustrates. Answer: co-dominance
⩥ By studying a karyotype, a prospective parent would be able to tell
Answer: if there is an alteration in the number of chromosomes.
⩥ A person who has type AB blood illustrates the principle of Answer:
co-dominance
⩥ In a pedigree chart, which is correct? Answer: A line between a circle
and a square represents a mating.
⩥ How many sex chromosomes are in an egg or a sperm? Answer: one
⩥ A carrier of a genetic disorder who does not show symptoms is most
likely to be __________ to transmit it to offspring. Answer:
heterozygous for the trait and able
, ⩥ Human skin color varies greatly from one individual to another. The
specific genetic situation to account for this fact is Answer: polygenic
inheritance - several genes act together to govern the phenotype of a
certain characteristic.
⩥ If a colorblind woman marries a colorblind man, the chances of any
daughter being of normal vision is Answer: 0%
⩥ A man has hemophilia, but his parents do not. Using H for normal and
h for hemophilia, give the genotype of his father, mother, and himself in
that order. Answer: XHY, XHXh, XhY
⩥ In the gene arrangement ABCDEFG breaks and a segment repositions
itself so that the segment now reads ABEDCFG, what specific kind of
mutation has occurred? Answer: Inversion
⩥ Many genetic disorders of humans are caused by Answer: recessive
alleles
⩥ Which refers to the addition of an extra segment of a chromosome?
Answer: duplication
⩥ Parents who do not have cystic fibrosis (recessive) produce a child
who has cystic fibrosis. What are the chances that each child born to this
couple will have cystic fibrosis? Answer: 25%
TEST PAPER 2026 DETAILED QUESTIONS
AND THOROUGHLY REVIEWED
ACCURATE SOLUTIONS GRADED A+
⩥ The expression of both alleles for a trait in a heterozygous individual
illustrates. Answer: co-dominance
⩥ By studying a karyotype, a prospective parent would be able to tell
Answer: if there is an alteration in the number of chromosomes.
⩥ A person who has type AB blood illustrates the principle of Answer:
co-dominance
⩥ In a pedigree chart, which is correct? Answer: A line between a circle
and a square represents a mating.
⩥ How many sex chromosomes are in an egg or a sperm? Answer: one
⩥ A carrier of a genetic disorder who does not show symptoms is most
likely to be __________ to transmit it to offspring. Answer:
heterozygous for the trait and able
, ⩥ Human skin color varies greatly from one individual to another. The
specific genetic situation to account for this fact is Answer: polygenic
inheritance - several genes act together to govern the phenotype of a
certain characteristic.
⩥ If a colorblind woman marries a colorblind man, the chances of any
daughter being of normal vision is Answer: 0%
⩥ A man has hemophilia, but his parents do not. Using H for normal and
h for hemophilia, give the genotype of his father, mother, and himself in
that order. Answer: XHY, XHXh, XhY
⩥ In the gene arrangement ABCDEFG breaks and a segment repositions
itself so that the segment now reads ABEDCFG, what specific kind of
mutation has occurred? Answer: Inversion
⩥ Many genetic disorders of humans are caused by Answer: recessive
alleles
⩥ Which refers to the addition of an extra segment of a chromosome?
Answer: duplication
⩥ Parents who do not have cystic fibrosis (recessive) produce a child
who has cystic fibrosis. What are the chances that each child born to this
couple will have cystic fibrosis? Answer: 25%
