BNNS502 pt 2 Exam Study Guide 2024
Functions of the nucleus - Ans:-Control cellular structure, directs cellular activity, produces
ribosomes
How many pairs of chromosomes does the body have - Ans:-23
2 chromosomes making up a chromosome pair are called - Ans:-Homologous chromosomes
Allelels ar...
Homozygous vs Heterozygous - Ans:✔✔-Homozygous: Same alleles (PP,pp)
Heterozygous: Different alleles (Pp)
Are genetic disorders Dominant or recessive - Ans:✔✔-Recessive and takes both parents to be carriers
Autosomes vs sex chromosomes - Ans:✔✔-Autosomes: Any chromosome that isn't a sex chromosome
Sex chromosome: 23rd pair (XX or XY)
XX and XY code for - Ans:✔✔-XX: Female
XY: Male
What does the X chromosome contain - Ans:✔✔-Genes important for brain function, clottong factor and
cone pigments
Why are male sex linked traits more common - Ans:✔✔-Because it always expressed because there is no
corresponding allele on Y chromosome, females must have 2 sexlinked recessive alleles
What errors can occur during meiosis - Ans:✔✔-Trisomy (2n+1) or monosomy (2n -1)
Down syndrome occurs when - Ans:✔✔-There is an extra 21st chromosome
What is a teratogen - Ans:✔✔-Any agent or influence that causes developmental defects in the embryo
ie chemicals, drugs, cigarettes, irradition
Page 3/16
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 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 GraceAmelia. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £7.96. You're not tied to anything after your purchase.
