100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Unit 11 Assignment 11.2 Chromosomes £6.99   Add to cart

Other

Unit 11 Assignment 11.2 Chromosomes

 169 views  4 purchases

This is the second assignment from unit 11 BTEC. This assignment was awarded a distinction grade and it covers all the criteria needed to complete the specification.

Preview 1 out of 12  pages

  • November 8, 2022
  • 12
  • 2021/2022
  • Other
  • Unknown
All documents for this subject (147)
avatar-seller
oanaandrada
Chromosome:
They are formed from chromatin fibres through eukaryotic
cell division. Found in the nucleus of a eukaryotic cell (in
humans containing 23 pairs of chromosomes and 46 in total)
with a thread-like structure which contains lots of
chromatids. These chromatids are made up of single length
of DNA which is wrapped and histone proteins which form
nucleosomes of 8. Nucleosomes coil to form chromatin
loops. These chromatins are joining together to form a
condense chromosome.

Chromosomes generally carry genetic information from one generation to other. They are
involved in in the process of cell division, replication and creating daughter cells, and become
visible during the 1st stage of mitosis; prophase where the nuclear membrane plus the
nucleolus disappears.
Chromatids
Chromatid:
Start as one chromatid and in DNA replication of a chromosome, two identical sister
chromatids are created, and they are attached to one another forming a whole chromosome
of 2 identical sister chromatids. They are becoming chromosomes only when mitosis or
meiosis occurs which makes them separate.
In order to pass into the stage of cell division, chromatids allow each cell to hold two copies of their
information inside.
They are visible during prophase when the DNA condenses into sister chromatids and
the nucleus is disappearing.


Centromere:
Located where the two chromatids join, they attach to spindles during cell
division.
Made of DNA sequences. Centromere


Homologous chromosome:
Pair of chromosomes which have identical size, identical genes at the same location, gene loci on the
two chromosomes. But they might have different alleles.
One homologous come from one parent(mom) and the other comes from another Two sister chromatids=
parent(dad). chromosome
They take part in mitosis or meiosis where it allows the genetic material from both
parents to combine into new cells.
They pair up in the stage of prophase 1 and exchange their genetic material
by crossing over each other. They also can be visible.


Non-homologous chromosome:
Chromosomes which have alleles of different types of genes.
X and Y Chromosomes are known as non-homologous.

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller oanaandrada. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for £6.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

79271 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now

Start selling
£6.99  4x  sold
  • (0)
  Add to cart