AP Biology Help » Cellular Biology » Cell Functions » Cellular Division » Understanding Meiosis
Explanation:

Gametes are haploid cells that produced by means of meiosis. Throughout meiosis, diploid cells divide right into four nonidentical haploid daughter cells. Mitosis produces two identical diploid somatic cells from one parent cell.


*


*


*


*


*


Explanation:

Meiosis outcomes in cells via 23 chromosomes (22 autosomes and also 1 sex chromosome). Keep in mind that these cells are haploid since n=23, and nonthe same, because of crossing over during prophase I.

You are watching: Why are human gametes haploid instead of diploid


Explanation:

Gametes are made via meiosis which produces cells through n=23 instead of diploid cells. If gametes were produced instead by mitosis each gamete would certainly be diploid not haploid. During fertilization of diploid gametes, the zygote would end up being 4n=92. With each brand-new generation the variety of chromosomes would certainly double.


Explanation:

In biology, the term “ploidy” describes the number of chromosome sets per cell. Haploid cells have half of the variety of chromosomes as parent cells, interpretation that they only bring a solitary copy of each gene. Haploid cells are formed in the time of meiosis and also, in human beings, develop gametes, which mature into sperm and also egg cells.


Explanation:

Diploid cells contain 2 duplicates of each chromosome, therefore containing twice as many type of (2n) chromosomes as a haploid cell (n), which contain just one copy of each chromosome. In human beings, diploid somatic cells contain 46 chromosomes, or 23 pairs of chromosomes.


Explanation:

Trisomy 21, or Down syndrome results once a huguy individual inherits three copies of chromosome 21, instead of the normal 2 copies (one maternal and one paternal). This is led to by nondisjunction, or the improper segregation of chromosomes in the time of cell division. In the situation of trisomy 21, nondisjunction leads to a faitempt of chromosome 21 segregation during meiosis (the majority of of the moment during anaphase I). This outcomes in either an egg or sperm transferring 2 duplicates of chromosome 21 rather of one. The zygote created by fertilization establishes right into an individual that has three copies of chromosome 21. Trisomy 21 manifests in physical expansion delays, intellectual disabilities, and distinctive facial attributes. 


Report an Error

Example Inquiry #132 : Cellular Division


Which molecular device is not a feasible reason of nondisjunction?


Possible Answers:

Maternal gametes have a higher possibility of exhibiting nondisjunction


Faitempt to pass the spindle assembly checkpoint


Error in cytoplasmic partitioning


Older age of an individual leads to weaker cohesin complexes at the centromere


Correct answer:

Error in cytoplasmic partitioning


Explanation:

Nondisjunction is the improper segregation of chromosomes in the time of meiosis or mitosis. The molecular causes behind nondisjunction are (1) increased rate of nondisjunction in female cells, (2) faiattract to correctly pass the spindle assembly checksuggest, and also (3) weakening of the cohesion facility at the centromere because of age.


Report an Error

Example Inquiry #31 : Understanding Meiosis


Which of the complying with organisms carry out not perdevelop meiosis?


Possible Answers:

Mosses


Mammals


Bacteria


Flowering plants


Correct answer:

Bacteria


Explanation:

Meiosis is a process that produces gametes in sex-related remanufacturing. As such, organisms that undergo sex-related reproduction or feature sexual life steras undergo meiosis. Mammals develop haploid sperm and also eggs with meiosis, which fuse to develop a diploid zygote. In mosses, reproduction is called the altercountry of generations, definition that generations different in between haploid and diploid develops. In this system, meiosis produces haploid spores throughout the sporophyte generation, which germinate to develop gametophyte precursors. In flowering plants, cells in male and female sex-related organs undergo meiosis to form precursor sex cells, called spores. Prokaryotes, consisting of bacteria, perform asex-related reproduction that does not include the process of meiosis. Types of asex-related reproduction encompass fission, budding, and also fragmentation. In the instance of bacteria, cells redevelop by binary fission, or cellular department without mitotic spindles.


Report an Error

Example Inquiry #39 : Understanding Meiosis


What enzyme aids in chromosomal crossing over throughout prophase I of meiosis?


Possible Answers:

Protein kinase


DNA polymerase


Recombinase


DNA ligase


Correct answer:

Recombinase


Explanation:

Throughout crossing over in prophase I of meiosis, tright here is a physical exchange of hereditary product in between homologous chromosomes. This exreadjust occurs at the sites of double stranded breaks, wbelow recombinase enzymes facilitate the invasion of the various other chromatid. The original strand and also invading strand anneal adhering to this intrusion. When this happens between two chromosomes, the strands create a tetrahedral plan called a Holliday junction. Other recombinase enzymes relocate the junction down the strands, furthering recombicountry.


Report an Error

Example Question #40 : Understanding Meiosis


What is the term for the structural plan of chromatids undergoing crossing over during meiosis?


Possible Answers:

Kinetochore


Telomere


Equatorial plane


Holliday junction


Correct answer:

Holliday junction


Explanation:

During prophase I of meiosis, homologous chromosomes exadjust genetic product in a process called crossing over. Double stranded breaks and also recombinase enzymes facilitate chromatid intrusion and annealing. The tetrahedral framework formed through strand intrusion between 2 chromosomes is dubbed the Holliday junction.


Report an Error
← Previous 1 2 3 4 5 6 7 8 Next →
View AP Biology Tutors
Meagan Certified Tutor
Colorado State University-Fort Collins, Bachelor of Science, Bioclinical Sciences. College of Coloracarry out Anschutz Medical Cam...
View AP Biology Tutors
Mikhail Certified Tutor
Stony Brook College, Bachelor of Science, Biology, General. Amerihave the right to College of the Caribbean School of Medicine, Curre...

See more: The Walking Dead Black And White Episode Of Walking Dead In Black & White


View AP Biology Tutors
Parker Certified Tutor
University of Coloraexecute Boulder, Bachelor in Arts, Physiology. Universidad Autonoma de Guadalajara, Doctor of Medicine, Premed...

All AP Biology Reresources


10 Diagnostic Tests 419 Practice Tests Concern of the Day Flashcards Find Out by Concept
Popular Subjects
Calculus Tutors in Los Angeles, Spanish Tutors in Miami, LSAT Tutors in Washington DC, ISEE Tutors in San Diego, ISEE Tutors in San Francisco-Bay Area, Math Tutors in San Francisco-Bay Area, Computer Science Tutors in New York City, Biology Tutors in Seattle, Physics Tutors in Philadelphia, ACT Tutors in Denver
Popular Courses & Classes
GMAT Courses & Classes in San Diego, Spanish Courses & Classes in Seattle, SSAT Courses & Classes in Chicback, ISEE Courses & Classes in Los Angeles, ACT Courses & Classes in Boston, SAT Courses & Classes in Atlanta, ISEE Courses & Classes in Miami, SAT Courses & Classes in Phoenix, GRE Courses & Classes in Dallas Ft Worth, SSAT Courses & Classes in Phoenix
Popular Test Prep
ACT Test Prep in San Francisco-Bay Area, ACT Test Prep in Boston, SSAT Test Prep in San Francisco-Bay Area, MCAT Test Prep in Seattle, GMAT Test Prep in San Diego, SAT Test Prep in Denver, SAT Test Prep in Phoenix, GMAT Test Prep in Seattle, SSAT Test Prep in Phoenix, LSAT Test Prep in San Francisco-Bay Area
Report an problem with this question

If you"ve uncovered an concern via this question, please let us know. With the assist of the neighborhood we have the right to proceed to enhance our educational resources.


Do not fill in this field
* Your Name:
* Issue Description:
DMCA Complaint

Your Infringement Notice might be forwarded to the party that made the content available or to third parties such as ChillingEffects.org.

Please follow these procedures to file a notice:

You need to incorporate the following:

Sfinish your complaint to our designated agent at:

Charles Cohn Varsity Tutors LLC 101 S. Hanley Rd, Suite 300 St. Louis, MO 63105