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
Sections
Sexual Reproduction
Meiosis
Additional Practice
Mitosis vs. Meiosis

Solution: Imagine that the cell in the figure below is from a bird known as a blue-footed booby.a. Is this cell undergoing mitosis, meiosis I, or meiosis II? HOW DID YOU DECIDE?b. What is the diploid number of the organism from which this cell arose?c. Name the structures being pulled apart by the spindle fibers.d. Has crossing over occurred in this cell? If so, for which alleles?e. What combination of alleles (i.e., what  genotype) will be found in each of the daughter cells that immediately result from the completion of the cell-division stage shown above?f. What is the genotype of the individual (or the diploid cell) that gave rise to the cell above?g. How many genetically distinct or different gametes (with respect to the genes and alleles shown) can an individual with this diploid genotype produce? Please write the genotypes for all possible gametes that this individual could produce.

Solution: Imagine that the cell in the figure below is from a bird known as a blue-footed booby.a. Is this cell undergoing mitosis, meiosis I, or meiosis II? HOW DID YOU DECIDE?b. What is the diploid number of

Problem

Imagine that the cell in the figure below is from a bird known as a blue-footed booby.

a. Is this cell undergoing mitosis, meiosis I, or meiosis II? HOW DID YOU DECIDE?

b. What is the diploid number of the organism from which this cell arose?

c. Name the structures being pulled apart by the spindle fibers.

d. Has crossing over occurred in this cell? If so, for which alleles?

e. What combination of alleles (i.e., what  genotype) will be found in each of the daughter cells that immediately result from the completion of the cell-division stage shown above?

f. What is the genotype of the individual (or the diploid cell) that gave rise to the cell above?

g. How many genetically distinct or different gametes (with respect to the genes and alleles shown) can an individual with this diploid genotype produce? Please write the genotypes for all possible gametes that this individual could produce.