A gene is a segment of DNA that contains the instructions for different characteristics/traits.
What is a mutation?
An error when copying DNA - a change to the DNA sequence.
What happens in Cytokinesis?
The cell membrane pinches off and 2 separate cells are formed.
What happens in telophase?
The nuclear envelope reforms and spindle fibres disappear
In Meiosis, what is the difference between Prophase 1 & 2?
Prophase 1 has crossing over of genetic material where as prophase 2 does not
What does the term Homozygous refer to?
2 of the same allele
What is the difference between Metaphase 1 & 2
Metaphase 1 the pairs of chromosomes line up long the middle and independent assortment (IA) happens. M 2 no IA and sister chromatids line up in the middle
True or false: Meiosis produces genetically identical cells
False
What happens in Prophase?
Nuclear envelope disintegrates and chromosomes condense. Spindle fibres appear
What is a chromosome?
DNA is packaged into thread-like structures
Semi-conservative replication DNA strands are made up of?
A new molecule consists of one original (parental) strand and one newly made strand
What symbol represents a female in a pedigree chart?
a circle
What happens in anaphase?
Spindle fibres pull sister chromatids towards the poles of the cell