All Chapters
Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch.4 - Carbon
Ch.5 - Biological Molecules
Ch.6 - Cells
Ch.7 - The Membrane
Ch.8 - Energy and Metabolism
Ch.9 - Respiration
Ch.10 - Photosynthesis
Ch.11 - Cell Signaling
Ch.12 - Cell Division
Ch.13 - Meiosis
Ch.14 - Mendelian Genetics
Ch.15 - Chromosomal Theory of Inheritance
Ch.16 - DNA Synthesis
Ch.17 - Gene Expression
Ch.18 - Regulation of Expression
Ch.19 - Viruses
Ch.20 - Biotechnology
Ch.21 - Genomics
Ch.22 - Development
Ch.23 - Evolution by Natural Selection
Ch.24 - Evolution of Populations
Ch.25 - Speciation
Ch.26 - History of Life on Earth
Ch.27 - Phylogeny
Ch.28 - Prokaryotes
Ch.29 - Protists
Ch.30 - Plants
Ch.31 - Fungi
Ch.32 - Overview of Animals
Ch.33 - Invertebrates
Ch.34 - Vertebrates
Ch.35 - Plant Anatomy
Ch.36 - Vascular Plant Transport
Ch.37 - Soil
Ch.38 - Plant Reproduction
Ch.39 - Plant Sensation and Response
Ch.40 - Animal Form and Function
Ch.41 - Digestive System
Ch.42 - Circulatory System
Ch.43 - Immune System
Ch.44 - Osmoregulation and Excretion
Ch.45 - Endocrine System
Ch.46 - Animal Reproduction
Ch.47 - Nervous System
Ch.48 - Sensory Systems
Ch.49 - Muscle Systems
Ch.50 - Ecology
Ch.51 - Animal Behavior
Ch.52 - Population Ecology
Ch.53 - Community Ecology
Ch.54 - Ecosystems
Ch.55 - Conservation Biology
Sexual Reproduction
Additional Practice
Mitosis vs. Meiosis

Concept #1: Sexual Reproduction and Heredity

Concept #2: Ploidy, Germ Cells, and Fertilization

Concept #3: Alteration of Generations and the Paradox of Sex

Practice: Mitosis is nuclear division that yields _________ cells, while meiosis is nuclear division that produces _______ cells.

Practice: Multicellular organisms are made of diploid cells, except for their gametes.

Alternate forms of the same gene are called:  a. Chromatids b. Centromeres c. Chromosomes d. Alleles e. Traits
Autosomes:  a. Are chromosomes that are the same for both sexes b. Include the Y chromosome in humans c. Include the X chromosome in humans d. Are the sex chromosomes e. All are correct
Homologous chromosomes have:  a. The same genes but can have different alleles b. The same genes and alleles c. Different genes and alleles d. Different genes, but can have the same alleles
A single chromosome has:  a. Multiple genes each with a single allele b. Multiple genes each with multiple alleles c. A single gene with a single allele d. A single gene with multiple alleles
Chromosomes that look alike and carry the same sequence of genes for the same traits are: a. The X and Y chromosomeb. All the autosomesc. Homologous chromosomesd. Found in females onlye. Found in males only
Which of the following specifically represent duplicated (exact copies) of DNA?a. two homologous chromosomesb. a diploid set of chromosomesc. a haploid set of chromosomesd. two sister chromatids
A portion of DNA that encodes a specific protein is:a. A geneb. A chromosomec. A chromatidd. A centromeree. A kinetochore
A cell with two full sets of chromosomes would be termed a _______________ cell. a. Haploidb. Sisterc. Diploidd. Gamete
A cell with one set of chromosomes would be termed a ________________ cell. a. Diploidb. Sisterc. Somaticd. None of the above are correcte. Haploid
If a sperm cell combines with an egg cell the result is a: a. Diploid cellb. Gametec. Haploid cell
An example of a haploid cell is: a. A skin cellb. A sperm cellc. A zygoted. A stem celle. All are correct
Asexual reproduction differs from sexual reproduction in that: a.  Asexual reproduction produces genetically diverse offspringb.  Asexual reproduction occurs only in bacteriac.  Asexual reproduction produces offspring that are virtually identicald.  Asexual reproduction does not occur in animals
If a diploid cell has 14 chromosomes, it will have: a. 14 pairs of homologous chromosomesb. 7 pairs of homologous chromatidsc. 14 pairs of homologous chromatidsd. 7 pairs of homologous chromosomese. 14 alleles
We describe DNA as the hereditary material of an organism. What does it mean for something to be hereditary? a. It must be located in the nucleus b. It must have an important effect on cell function c. It must be passed from one generation to the next d. It must be present in all offspring e. It must be incredibly complex
All sexual life cycles include: a. Mitosis, gamete formation, and fertilizationb. Mitosis, meiosis, and gamete formationc. Meiosis, gamete formation, and fertilizationd. Mitosis, fertilization, and meiosise. None of these are correct
A germline mutation occurs in cells that give rise to: a. Gametesb. Diploid cellsc. Skin cellsd. Nonsex cellse. Liver cells
What determines development of the male or female reproductive system in the developing fetus?