Lesson 1 Flashcards
1
Q
What is a gene?
A
The DNA on chromosomes arranged in segments
Genes are the basic units of heredity in living organisms.
2
Q
What are sex cells?
A
Cells that have half the number of chromosomes
These cells are also known as gametes.
3
Q
Define haploid.
A
A cell with n number of chromosomes
Haploid cells are typically found in gametes.
4
Q
What is a diploid cell?
A
A cell that contains 2n number of chromosomes
Diploid cells are the typical state for somatic cells in an organism.
5
Q
What is meiosis?
A
A type of cell division that reduces the number of chromosomes
Meiosis is essential for sexual reproduction.
6
Q
What is crossing over?
A
A process in which chromosomal segments are exchanged between a pair of homologous chromosomes
This process increases genetic diversity during meiosis.
