BIOLOGY 189 EXAM 1 WITH QUESTIONS AND
ANSWERS|| GUARANTEED PASS|| ALREADY
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What are HeLa cells? Where did they come from? What kind of cells are they?
Why are they used? - ANSWER-HeLa cells were the first human cells that
researchers could grow and multiply endlessly in the lab. They are cancer cells
from cervical cancer.
What are the cell cycle stages? - ANSWER-Interphase G1, G0, S, G2,Mitosis,
cytoplasmic division
Which stages are specifically part of mitosis? - ANSWER-Prophase, metaphase,
anaphase, and telophase.
What cells undergo mitosis? - ANSWER-somatic cells
What cells undergo meiosis? - ANSWER-gametes
What are they major steps of mitosis? - ANSWER-Prophase:, the nuclear
envelope break down, chromosomes attach to spindle fibers by their
centromeres Metaphase: chromosomes line up in the middle) Anaphase: sister
chromatids are pulled to opposite poles of the cell Telophase: nuclear envelope
reforms, chromosomes unfold into chromatin,
,What are they major steps of meiosis? - ANSWER-prophase1:chromosomes
pack tightly, attach to spindle poles Metaphase1: chromosomes line up in the
middle Anaphase1: sister chromatids are pulled to opposite poles of the cell
Telophase1: nuclear envelope reforms, chromosomes unfold into chromatin, (
repeat with starting with prophase 2)
In which stage do cells typically spend most of their life? - ANSWER-
Interphase
What is crossing over? - ANSWER-the exchange of genes between homologous
chromosomes, resulting in a mixture of parental characteristics in offspring.
Does crossing over occur in mitosis? - ANSWER-No, only in meiosis
What is a karyotype? - ANSWER-an individual's complete set of chromosomes
What chromosome pairs is assigned female? - ANSWER-XX
What chromosome pairs is assigned male? - ANSWER-XY
What is the total chromosome number in humans? - ANSWER-46
What is the difference between diploid cells and haploid cells? - ANSWER-The
number of chromosome sets that are found in the nucleus
Does mitosis result in diploid or haploid cells? - ANSWER-Diploid
Does meiosis result in diploid or haploid cells? - ANSWER-haploid
, How many daughter cells are produced by mitosis? Meiosis? Are they haploid
or diploid? - ANSWER-2 daughter cells mitosis , 4 daughter cells meiosis -
haploid
What part of the DNA might be the only physiological barrier to immortality? -
ANSWER-Telomeres
What is an oncogene? - ANSWER-a gene that in certain circumstances can
transform a cell into a tumor cell.
What is a tumor suppressor gene? - ANSWER-a gene that protects a cell from
one step on the path to cancer (put the brakes on the cell cycle.)
What is a tumor? - ANSWER-a mass of abnormal cells
What is cancer? - ANSWER-the disease caused by an uncontrolled division of
abnormal cells in a part of the body.
What does benign mean? - ANSWER-non-cancerous
What does malignant mean? - ANSWER-cancerous
What does homozygous mean? - ANSWER-chromosomes with the same allele
of a gene.
What does heterozygous mean? - ANSWER-two different alleles
What is a genotype? - ANSWER-genetic makeup of an organism (set of alleles
that occur in an individual's chromosomes.)
ANSWERS|| GUARANTEED PASS|| ALREADY
GRADED A+|| LATEST UPDATE 2026
What are HeLa cells? Where did they come from? What kind of cells are they?
Why are they used? - ANSWER-HeLa cells were the first human cells that
researchers could grow and multiply endlessly in the lab. They are cancer cells
from cervical cancer.
What are the cell cycle stages? - ANSWER-Interphase G1, G0, S, G2,Mitosis,
cytoplasmic division
Which stages are specifically part of mitosis? - ANSWER-Prophase, metaphase,
anaphase, and telophase.
What cells undergo mitosis? - ANSWER-somatic cells
What cells undergo meiosis? - ANSWER-gametes
What are they major steps of mitosis? - ANSWER-Prophase:, the nuclear
envelope break down, chromosomes attach to spindle fibers by their
centromeres Metaphase: chromosomes line up in the middle) Anaphase: sister
chromatids are pulled to opposite poles of the cell Telophase: nuclear envelope
reforms, chromosomes unfold into chromatin,
,What are they major steps of meiosis? - ANSWER-prophase1:chromosomes
pack tightly, attach to spindle poles Metaphase1: chromosomes line up in the
middle Anaphase1: sister chromatids are pulled to opposite poles of the cell
Telophase1: nuclear envelope reforms, chromosomes unfold into chromatin, (
repeat with starting with prophase 2)
In which stage do cells typically spend most of their life? - ANSWER-
Interphase
What is crossing over? - ANSWER-the exchange of genes between homologous
chromosomes, resulting in a mixture of parental characteristics in offspring.
Does crossing over occur in mitosis? - ANSWER-No, only in meiosis
What is a karyotype? - ANSWER-an individual's complete set of chromosomes
What chromosome pairs is assigned female? - ANSWER-XX
What chromosome pairs is assigned male? - ANSWER-XY
What is the total chromosome number in humans? - ANSWER-46
What is the difference between diploid cells and haploid cells? - ANSWER-The
number of chromosome sets that are found in the nucleus
Does mitosis result in diploid or haploid cells? - ANSWER-Diploid
Does meiosis result in diploid or haploid cells? - ANSWER-haploid
, How many daughter cells are produced by mitosis? Meiosis? Are they haploid
or diploid? - ANSWER-2 daughter cells mitosis , 4 daughter cells meiosis -
haploid
What part of the DNA might be the only physiological barrier to immortality? -
ANSWER-Telomeres
What is an oncogene? - ANSWER-a gene that in certain circumstances can
transform a cell into a tumor cell.
What is a tumor suppressor gene? - ANSWER-a gene that protects a cell from
one step on the path to cancer (put the brakes on the cell cycle.)
What is a tumor? - ANSWER-a mass of abnormal cells
What is cancer? - ANSWER-the disease caused by an uncontrolled division of
abnormal cells in a part of the body.
What does benign mean? - ANSWER-non-cancerous
What does malignant mean? - ANSWER-cancerous
What does homozygous mean? - ANSWER-chromosomes with the same allele
of a gene.
What does heterozygous mean? - ANSWER-two different alleles
What is a genotype? - ANSWER-genetic makeup of an organism (set of alleles
that occur in an individual's chromosomes.)
