6.2 Passing Genes & Chromoses To Daughter Cells Flashcards
What is Asexual reproduction?
When there is only one parent and the offspring is genetically identical to the parent
What is Sexual Reproduction?
When Gametes are combined from two parents thus causing the offsprings to be genetically different from one another and from the parent
What are Gametes?
They’re sex cells (Sperm nuclei and eggs)
What happens before cell division?
Cells must copy their DNA
What is a Gene?
A section of DNA that has the instructions for making all proteins
How many molecules of DNA are wrapped around proteins to from a chromosome containing hundreds of genes?
One
How many chromosomes do humans have?
46
How are chromosomes before cell division?
Uncondensed
Where are duplicated chromosomes held together?
At the centromere
What are duplicated chromosomes called?
Sister chromatids
How are chromosomes duplicated?
Through DNA replication
What are the sides of a DNA’s twisted ladder composed of?
A sugar-phosphate backbone
What forms the “rungs” of the ladder?
Nucleotides are connected to each other by hydrogen bonds to form the “rungs”
What does Adenine (A) pair with in DNA?
Thymine (T)
What does Cytosine (C) pair with in DNA?
Guanine (G)
