Notes
Notes - notes.io |
g1 phase - cell grows
S phase - DNA replication
g2 phase - preparation for mitosis
M phase - mitosis and cytokinesis
Stages of Mitosis:
prophase - mitosis begins, centrioles appear and move to opposite ends of the cell, spindle begins to form
metaphase - sister chromatids attach to the spindle fibers and line up along the equatorial plane of the cell
anaphase - chromatids separate and move to opposite ends of the cell
telophase - nuclei begin to form, cell membrane starts to pinch in
cytokinesis - cell membrane pinches in to form two new daughter cells genetically identical to the parent cell
Sister chromatids are two genetically identical chromosomes that are laced together at the centromere
Mitosis:
the purpose is to produce genetically identical daughters cells for growth, repair, and replacement
two daughter cells are produced
daughter cells are diploid
daughter cells are genetically identical
Meiosis:
the purpose is to produce gametes for reproductive purposes
four new daughter cells are produced
daughter cells are haploid
daughter cells are genetically different
sexual reproduction produces more genetic variation than asexual reproduction because it introduces genetic traits from two individuals, while asexual reproduction only involves the genes of one individual
the diploid number of chromosomes for humans is 46, the haploid number is 23
gametes are haploid reproductive cells that are produced during meiosis
each gamete is genetically unique because:
during prophase 1, genes between chromosomes are crossed over
during meiosis, the number of chromosomes is reduced by half
during prophase 1, synapsis and crossing over occurs
a chromosome contains all the genes
the law of segregation states that traits are categorized into distinct units (alleles) and that the individual carries two factors inherited from each parent
the law of independent assortment states that alleles will sort out independently when gametes are formed
|
|
Notes.io is a web-based application for taking notes. You can take your notes and share with others people. If you like taking long notes, notes.io is designed for you. To date, over 8,000,000,000 notes created and continuing...
With notes.io;
- * You can take a note from anywhere and any device with internet connection.
- * You can share the notes in social platforms (YouTube, Facebook, Twitter, instagram etc.).
- * You can quickly share your contents without website, blog and e-mail.
- * You don't need to create any Account to share a note. As you wish you can use quick, easy and best shortened notes with sms, websites, e-mail, or messaging services (WhatsApp, iMessage, Telegram, Signal).
- * Notes.io has fabulous infrastructure design for a short link and allows you to share the note as an easy and understandable link.
Fast: Notes.io is built for speed and performance. You can take a notes quickly and browse your archive.
Easy: Notes.io doesn’t require installation. Just write and share note!
Short: Notes.io’s url just 8 character. You’ll get shorten link of your note when you want to share. (Ex: notes.io/q )
Free: Notes.io works for 12 years and has been free since the day it was started.
You immediately create your first note and start sharing with the ones you wish. If you want to contact us, you can use the following communication channels;
Email: [email protected]
Twitter: http://twitter.com/notesio
Instagram: http://instagram.com/notes.io
Facebook: http://facebook.com/notesio
Regards;
Notes.io Team
