HEREDITY AND GENETICS UNIT TEST
STUDY GUIDE LATEST EXAM 2025/2026
GRADED A+ AND APPROVED
Which of the following traits is influenced by both inheritance
and environmental factors? - THE CORRECT ANSWER-the ability to
sing well
In Mendel's experiments, what proportion of the plants in the
F2 generation had a trait that had been absent in the F1
generation? - THE CORRECT ANSWER-one fourth
Factors that control traits are called - THE CORRECT ANSWER-genes.
Scientists call an organism that has two different alleles for a
trait a - THE CORRECT ANSWER-hybrid.
What does the notation Tt mean to geneticists? - THE CORRECT
ANSWER-one dominant allele and one recessive allele
What is probability? - THE CORRECT ANSWER-a number that
describes how likely it is that an event will occur
If a homozygous black guinea pig (BB) is crossed with a
homozygous white guinea pig (bb), what is the probability that
an offspring will have black fur? - THE CORRECT ANSWER-100 percent
, An organism's physical appearance is its - THE CORRECT ANSWER-
phenotype.
When sex cells combine to produce offspring, each sex cell will
contribute - THE CORRECT ANSWER-half the number of chromosomes
in body cells.
The different forms of a gene are called - THE CORRECT ANSWER-
alleles.
An organism that has two identical alleles for a trait is - THE
CORRECT ANSWER-homozygous.
A heterozygous organism has - THE CORRECT ANSWER-two different
alleles for a trait.
Chromosomes are made up of - THE CORRECT ANSWER-many genes
joined together.
TRUE OR FALSE: A hybrid is the offspring of parents that have
DIFFERENT alleles for a trait. - THE CORRECT ANSWER-TRUE
TRUE OR FALSE: When Mendel crossed purebred short plants
with purebred tall plants, all of the offspring were SHORT. - THE
CORRECT ANSWER-FALSE: When Mendel crossed purebred short
plants with purebred tall plants, all of the offspring were TALL.
STUDY GUIDE LATEST EXAM 2025/2026
GRADED A+ AND APPROVED
Which of the following traits is influenced by both inheritance
and environmental factors? - THE CORRECT ANSWER-the ability to
sing well
In Mendel's experiments, what proportion of the plants in the
F2 generation had a trait that had been absent in the F1
generation? - THE CORRECT ANSWER-one fourth
Factors that control traits are called - THE CORRECT ANSWER-genes.
Scientists call an organism that has two different alleles for a
trait a - THE CORRECT ANSWER-hybrid.
What does the notation Tt mean to geneticists? - THE CORRECT
ANSWER-one dominant allele and one recessive allele
What is probability? - THE CORRECT ANSWER-a number that
describes how likely it is that an event will occur
If a homozygous black guinea pig (BB) is crossed with a
homozygous white guinea pig (bb), what is the probability that
an offspring will have black fur? - THE CORRECT ANSWER-100 percent
, An organism's physical appearance is its - THE CORRECT ANSWER-
phenotype.
When sex cells combine to produce offspring, each sex cell will
contribute - THE CORRECT ANSWER-half the number of chromosomes
in body cells.
The different forms of a gene are called - THE CORRECT ANSWER-
alleles.
An organism that has two identical alleles for a trait is - THE
CORRECT ANSWER-homozygous.
A heterozygous organism has - THE CORRECT ANSWER-two different
alleles for a trait.
Chromosomes are made up of - THE CORRECT ANSWER-many genes
joined together.
TRUE OR FALSE: A hybrid is the offspring of parents that have
DIFFERENT alleles for a trait. - THE CORRECT ANSWER-TRUE
TRUE OR FALSE: When Mendel crossed purebred short plants
with purebred tall plants, all of the offspring were SHORT. - THE
CORRECT ANSWER-FALSE: When Mendel crossed purebred short
plants with purebred tall plants, all of the offspring were TALL.
