genetics c better
Studied by 0 people
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/30
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai |
|---|
No analytics yet
Send a link to your students to track their progress
31 Terms
Deoxyribonucleic acid
What does DNA stand for?
Double helix
What is the shape of DNA?
Sugar (deoxyribose) and phosphate groups
What are the main components of the DNA backbone?
Adenine (A) pairs with Thymine (T); Cytosine (C) pairs with Guanine (G)
Which nitrogenous bases pair together in DNA?
Hydrogen bonds
What type of bond holds DNA base pairs together?
3'-TAGC-5'
If a DNA strand is 5'-ATCG-3'
Because the two strands run in opposite directions (5’→3’ and 3’→5’)
Why is DNA considered antiparallel?
Adenine (A) and Guanine (G)
Which nitrogenous bases are purines?
Cytosine (C) and Thymine (T)
Which nitrogenous bases are pyrimidines?
Reduce chromosome number from diploid to haploid and allow genetic recombination
What is the main purpose of Meiosis I?
Chromosomes condense
homologous chromosomes pair (synapsis)
Homologous chromosome pairs align at the equatorial plate
What happens during Metaphase I?
Homologous chromosomes separate to opposite poles
What happens during Anaphase I?
Separate sister chromatids to produce four genetically unique haploid cells
What is the purpose of Meiosis II?
true
Cells start haploid in meiosis II not diploid
Sister chromatids separate and move to opposite poles
What happens during Anaphase II?
Four genetically unique haploid gametes
What is the final result of meiosis?
The process of forming gametes (sperm or eggs)
What is gametogenesis?
Formation of sperm in males
What is spermatogenesis?
Formation of eggs in females
What is oogenesis?
Four sperm cells
How many gametes are produced from one cell in spermatogenesis?
One egg and polar bodies
How many gametes are produced from one cell in oogenesis?
An abnormal number of chromosomes
What is aneuploidy?
Down syndrome (Trisomy 21)
Give an example of trisomy.
Changes in chromosome structure such as deletion duplication
inversion, or translocation that can affect gene expression and lead to genetic disorders
Males with an extra X chromosome (XXY)
What is Klinefelter syndrome?
Note 
Flashcards (49)