Flashcards in Lec 2. Mitosis & Meiosis Deck (60)
What is the ultimate source of genetic variation?
Meiosis provides a mechanism to
recombine variants and increase variability
what is the fundamental unit of heredity?
Genes come in multiple forms called
True or false? Genetic info is only carried in DNA
False, it is carried in DNA & RNA
where are genes located?
When do chromosomes separate?
mitosis and meiosis
What is evolution?
Change in genetic frequency in a population over time
Do prokaryotic cells have a nucleus?
Do eukaryotic cells have a nucleus?
What is the cell diameter for prokaryotic cells?
What is the cell diameter for eukaryotic cells?
What is the genome for prokaryotic cells?
one circular DNA molecule
What is the genome for eukaryotic cells?
multiple linear DNA molecules
What is the DNA in prokaryotic cells?
no histones in bacteria, some in archaea
What is the DNA in eukaryotic cells
complexed with histones
What is the amount of DNA in prokaryotic cells?
What is the amount of DNA in eukaryotic cells?
Do prokaryotic cells have membrane-bounded organelles?
Do eukaryotic cells have membrane-bounded organelles?
What are prokaryotes made up of?
eubacteria and archaea
True or False? Viruses are prokaryotic
False. Neither prokaryotic nor eukaryotic
what is one characteristic of Viruses?
Outer protein coat surrounds nucleic acid
True or False? Homologous chromosomes are similar but not identical
How are homologous chromosomes similar but not identical?
Each homolog carries the same genes in same order, but the alleles for each trait may not be the same
What do diploid cells carry?
two sets of genetic info. Two sets of chromosomes
What do haploid cells carry?
one set of genetic info
How many pairs of chromosomes do humans have?
attachment point for spindle microtubules