Cell Division Diversity Flashcards
Homologous pair meaning
They are made from one paternal and maternal copy. They carry the same genes but different alleles. They are the same length
What do statistical tests need
They need 2 or more means
How do yeast cells divide
Divide via mitosis where the nucleus moves into the bulge.
What’s the difference between plant and animal cell division
In plants plates from between new cells and cell division only occurs in the meristem
How are plant cells organized into tissues
Xylem walls are lignified. Xylem transports water via a transportation stream. Phloem consists of sieve tube element and contains no nucleus. It’s where translocation occurs
What is the role of squamous
Act as surfaces
What can embryo cells be used for
They can test how effective medicinal drugs are
They can test for side effects of new drugs
They can do developmental research
How are xylem elements produced from cells
Stem cells differentiate.the walls are lignified and end walls break down
What cells do phloem tissue contain
They contain companion cells and sieve element
Why does meiosis need more stages
To halve chromosome number and to separate homologous into and sister chromatids
How does genetic variation occur
Independent assortment of homologous chromosomes occur in metaphase 1so homologous chromosomes have different alleles as they come from different parents. Crossing over occurs in prophase 1. Chromatids will have a new combination of alleles. Mutations are changes to dna base. If damage is not recognized homologous pairs don’t separate so gametes are not genetically identical
What do guard cells have
A vacuole to take up water
Cell wall thicker on one side causing cell to bend
Mitochondria generates ATP
how does crossing over occur
chromosomes associate with each other ,chiasmata forms, equal lengths of alleles are exchanged producing a new combination of alleles.
