Textbook Question
An egg cell that is not fertilized follows which path?
a. Ovary, oviduct, uterus, cervix
b. Ovary, uterus, oviduct, cervix
c. Oviduct, ovary, cervix, uterus
d. Oviduct, ovary, uterus, cervix
e. Ovary, oviduct, cervix, uterus
Ch. 7 - Fertility
Belk, Maier6th EditionBiology: Science for LifeISBN: 9780135214084
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Table of contents
- Ch. 1 - Can Science Cure the Common Cold?12
- Ch. 2 - Science Fiction, Bad Science, and Pseudoscience12
- Ch. 3 - Is It Possible to Supplement Your Way to Better Performance and Health?10
- Ch. 4 - Body Weight and Health10
- Ch. 5 - Life in the Greenhouse10
- Ch. 6 - Cancer10
- Ch. 7 - Fertility10
- Ch. 8 - Does Testing Save Lives?10
- Ch. 9 - Biology of Wrongful Convictions10
- Ch. 10 - Genetically Modified Organisms10
- Ch. 11 - Where Did We Come From?13
- Ch. 12 - An Evolving Enemy8
- Ch. 13 - Understanding Race11
- Ch. 14 - The Greatest Species on Earth?8
- Ch. 15 - Is the Human Population Too Large?10
- Ch. 16 - Conserving Biodiversity12
- Ch. 17 - The Human Footprint10
Belk, Maier6th EditionBiology: Science for LifeISBN: 9780135214084Not the one you use?Change textbook
Chapter 7, Problem 8
If humans have 23 pairs of chromosomes, each carrying hundreds to thousands of genes, roughly how many genes are there in the human genome?
a. 23
b. 46
c. 1000
d. 20,000
e. 200,000
Verified step by step guidance1
Understand that humans have 23 pairs of chromosomes, which means there are 46 individual chromosomes in total (23 from each parent).
Each chromosome carries hundreds to thousands of genes. This means the total number of genes in the human genome is the sum of all the genes across all 46 chromosomes.
Recall that the human genome has been extensively studied, and it is estimated to contain approximately 20,000 to 25,000 genes in total.
Compare the given options to the estimated range of genes in the human genome. The correct answer should fall within this range.
Select the option that best matches the estimated number of genes in the human genome, which is approximately 20,000.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Chromosomes
Chromosomes are long, thread-like structures made of DNA and proteins that contain genetic information. In humans, there are 23 pairs of chromosomes, totaling 46, with each chromosome carrying many genes. The arrangement and number of chromosomes are crucial for understanding genetic inheritance and variation.
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Genes
Genes are segments of DNA that encode instructions for building proteins, which perform various functions in the body. Each gene can vary in length and complexity, and the total number of genes in the human genome is estimated to be around 20,000 to 25,000. Understanding genes is essential for studying genetics, heredity, and biological functions.
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Human Genome
The human genome is the complete set of genetic information for humans, consisting of all the chromosomes and their associated genes. It contains the instructions necessary for the growth, development, and functioning of the human body. The study of the human genome has significant implications for medicine, genetics, and evolutionary biology.
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Related Practice
Textbook Question
Which of the following is mismatched?
a. Urethra: sperm passage
b. Testes: hormone production
c. Vas deferens: semen production
d. Seminiferous tubules: sperm production
Textbook Question
The production of gametes ________.
a. Begins at puberty in males and females.
b. Requires that the testes of males produce semen.
c. Results in the production of diploid cells from haploid cells.
d. Begins at puberty in females.
e. Produces sperm and eggs that carry half the number of chromosomes as nongametes.
Textbook Question
Homologous pairs of chromosomes ________.
a. Are two different chromosomes attached to each other.
b. Are exact copies of one chromosome that are attached to each other.
c. Are separated from each other during meiosis I.
d. Are separated from each other during interphase.
e. Are chromosomes that carry different genes.
Textbook Question
After telophase I of meiosis, each daughter cell is ________.
a. Diploid, and the chromosomes are composed of one double-stranded DNA molecule.
b. Diploid, and the chromosomes are composed of two sister chromatids.
c. Haploid, and the chromosomes are composed of one double-stranded DNA molecule.
d. Haploid, and the chromosomes are composed of two sister chromatids.