PORTAGE LEARNING BIO 171 FINAL EXAM
ACTUAL QUESTIONS AND CORRECT
ANSWERS GRADED A+
⩥ What is different about meiosis compared to mitosis?
Answer: Meiosis involves 2 divisions.
⩥ How many daughter cells are formed in meiosis?
Answer: 4
⩥ How many copies of each chromosome do daughter cells formed by
meiosis have?
Answer: 1
⩥ What is the result of crossing over in meiosis?
Answer: Exchange of small sections of the chromatids leading to genetic
variety.
⩥ What is the passing of traits from parents to offspring?
Answer: Heredity
⩥ What is the branch of biology that focuses on heredity?
,Answer: Genetics
⩥ Who started the formal study of genetics?
Answer: Mendel
⩥ What is one thing known about Mendel?
Answer: Austrian monk; used pea plants in his experiments; laws of
heredity.
⩥ What is a useful feature of pea plants in genetic studies?
Answer: Small in size, easy to grow, mature quickly.
⩥ What is a cross involving one pair of contrasting traits?
Answer: Monohybrid cross
⩥ What is true breeding?
Answer: If all offspring display only one form of a trait.
⩥ What were the first 2 individuals crossed in Mendel's experiments
known as?
Answer: P generation
,⩥ What was the next step in Mendel's experiments after self-pollination
of the P generation plants?
Answer: Cross pollination of the two P-generation plants with different
flower colors.
⩥ Where do the two copies of a gene come from?
Answer: One copy from Dad, one copy from Mom.
⩥ What are alternative versions of genes called?
Answer: Alleles
⩥ How do alleles separate when gametes are formed?
Answer: Independently of each other.
⩥ What is probability?
Answer: Likelihood that an event will occur.
⩥ How can probability be expressed?
Answer: Decimal, Ratio, or Fraction.
⩥ What is the set of alleles an individual has?
Answer: Genotype
, ⩥ What is the physical appearance of a trait?
Answer: Phenotype
⩥ Who invented the Punnett square?
Answer: Reginald Punnett
⩥ What is a cross involving 2 or more pairs of contrasting traits?
Answer: Dihybrid cross
⩥ Where is the allele located for a sex-linked trait?
Answer: X chromosome
⩥ Why are sex-linked traits possible?
Answer: The Y chromosome of the male has no alleles.
⩥ What does it mean when 2 alleles of a pair of chromosomes are
identical?
Answer: The organism is homozygous.
⩥ What is an allele whose effect remains hidden when paired with a
different allele?
ACTUAL QUESTIONS AND CORRECT
ANSWERS GRADED A+
⩥ What is different about meiosis compared to mitosis?
Answer: Meiosis involves 2 divisions.
⩥ How many daughter cells are formed in meiosis?
Answer: 4
⩥ How many copies of each chromosome do daughter cells formed by
meiosis have?
Answer: 1
⩥ What is the result of crossing over in meiosis?
Answer: Exchange of small sections of the chromatids leading to genetic
variety.
⩥ What is the passing of traits from parents to offspring?
Answer: Heredity
⩥ What is the branch of biology that focuses on heredity?
,Answer: Genetics
⩥ Who started the formal study of genetics?
Answer: Mendel
⩥ What is one thing known about Mendel?
Answer: Austrian monk; used pea plants in his experiments; laws of
heredity.
⩥ What is a useful feature of pea plants in genetic studies?
Answer: Small in size, easy to grow, mature quickly.
⩥ What is a cross involving one pair of contrasting traits?
Answer: Monohybrid cross
⩥ What is true breeding?
Answer: If all offspring display only one form of a trait.
⩥ What were the first 2 individuals crossed in Mendel's experiments
known as?
Answer: P generation
,⩥ What was the next step in Mendel's experiments after self-pollination
of the P generation plants?
Answer: Cross pollination of the two P-generation plants with different
flower colors.
⩥ Where do the two copies of a gene come from?
Answer: One copy from Dad, one copy from Mom.
⩥ What are alternative versions of genes called?
Answer: Alleles
⩥ How do alleles separate when gametes are formed?
Answer: Independently of each other.
⩥ What is probability?
Answer: Likelihood that an event will occur.
⩥ How can probability be expressed?
Answer: Decimal, Ratio, or Fraction.
⩥ What is the set of alleles an individual has?
Answer: Genotype
, ⩥ What is the physical appearance of a trait?
Answer: Phenotype
⩥ Who invented the Punnett square?
Answer: Reginald Punnett
⩥ What is a cross involving 2 or more pairs of contrasting traits?
Answer: Dihybrid cross
⩥ Where is the allele located for a sex-linked trait?
Answer: X chromosome
⩥ Why are sex-linked traits possible?
Answer: The Y chromosome of the male has no alleles.
⩥ What does it mean when 2 alleles of a pair of chromosomes are
identical?
Answer: The organism is homozygous.
⩥ What is an allele whose effect remains hidden when paired with a
different allele?
