Test 1 Semester 2 Flashcards
Why did Gregor Mendel remove the stamens from the flowers of some plants?
So they wouldn’t self pollinate
What can a multipotent stem cell become?
Anything from the organ it derives in
What symbol is used to represent haploid cells?
N
Why do cells stay small?
set amount of DNA
can only provide for a certain amount of DNA
larger cells make it difficult to move things across the membrane
During which phase of the cell cycle is DNA replicated?
synthesis
Why are stem cells important?
Stem cells can heal or replace certain organs or internal injuries;it’s the body’s way of healing it’s self
What term is used to describe organisms that have 2 identical alleles for particular trait?
Homozygous
What is the name of the process that produces gametes
meiosis
Which scientist made x-ray diffraction photos of DNA?
Franklin
What is the nucleotide found in DNA?
Deoxyribose + Phosphate Group + cytosine
What principal states that during gamete formation genes for different traits separate without influencing each other’s inheritance?
Principle of independent assortment
A pea plant gamete has how many alleles for the height gene?
1
What are the phases of mitosis?
Interphase,Prophase, Metaphase,Anaphase,Telophase, and Cytokinesis
What did Watson and Crick call the shape of the DNA molecule?
A double Helix
What did Oswald Avery conclude in his experiment?
DNA stores and transmits genetic information from one generation to the next
What did Frederick Griffiths conclude in his experiment?
He discovered the process of transformation, and found that heat killed bacteria could pass a chemical compound that contained information to change harmless bacteria into disease causing bacteria. He also concluded that the transforming factor had to be a gene.
What is Apoptis?
cell death
How is the cell cycle regulated?
cyclins, internal & and external regulatory proteins
When are the tasks of a cell determined?
During development
What are stem cells?
unspecialized cells
What are the three kind of stem cells?
Totipotent: Can become anything
PluriPotent: Can become anything but Toti
and Multipotent: Can only be like the organ it derived from
