Exam (elaborations)
BIOS 256: week 6 Questions and Answers 100% Solved
- Course
- Institution
BIOS 256: week 6 Questions and Answers 100% Solved
[Show more]
Content preview
BIOS 256: week 6 Questions and Answers 100% Solvedtwo types of chromosomes Correct Ans-- the chromosome types are divided into two
categories, autosomes and sex chromosome
- XX = female
- XY = male
autosomes Correct Ans-- are structures that contain the hereditary information
- they do not contain information related to reproduction and sex determination
- they are identical in both sexes, i.e., male and female species of humans
- there are 46 (2n) chromosomes in humans
- of these 46 chromosomes, there are 44 pairs of autosomes and contain information related
to the phenotypic characters
> physical features
, BIOS 256: week 6 Questions and Answers 100% Solved
allosomes/heterosomes Correct Ans-- are sex chromosomes that are different from
autosomes in form, behavior and size
- there are two allosomes in humans
> the X chromosomes are present in the ovum and either the X or Y chromosome can be
present in the sperm
- these chromosomes help in determination of sex of the progeny
- if the offspring receives X chromosome from the mother as well as father, it results in a
female child (XX)
- if the offspring receives one X and one Y chromosome from the parents, it results in a male
child (XY)
- in simple words, it is the donation of X or Y chromosome by the father that helps the
determination of the sex of the child
sperm Correct Ans-- male sex cells
, BIOS 256: week 6 Questions and Answers 100% Solved
oocytes Correct Ans-- also called eggs
- female sex cell
sex cell production Correct Ans-- sex cells have 1 set of genetic instructions found on 23
chromosomes, compared to 2 sets of 46 chromosomes in other body cells
- when the sperm and egg unite at fertilization, the genetic information carried on 46
chromosomes is restored
- sex cells are produced by a special type of cell division called meiosis
meiosis Correct Ans-- includes 2 successive divisions, called the first (meiosis I) and second
(meiosis II) meiotic divisions
- prior to meiosis, each chromosomes replicates and contains 2 DNA strands, called
chromatids, connected by a centromere
somatic cells Correct Ans-- diploid cells
The benefits of buying summaries with Stuvia:
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
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
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 GOLDTUTORS. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79223 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now