Meiosis Flashcards
What is a karyotype?
Pictures of human cell’s chromosomes during metaphase that are arranged in pairs
A typical human body cell, called a ______ cell, has ___ chromosomes.
Somatic, 46
Almost every chromosome has a twin that…
Resembles its size and shape
What are homologous chromosomes?
A pair of chromosomes that match and carry versions of the same genes
What do sex chromosomes do?
Determine a person’s sex
Females have two ___ chromosomes, while males have one ___ and one ___ chromosome.
X, X, Y
The chromosomes that are not se chromosomes are called…
Autosomes
What is a diploid organism?
An organism in which all body cells contain homologous pairs of chromosomes
What is a diploid number? What is it represented as?
The total number of chromosomes in an organism, 2n
What are gametes?
Egg and sperm cells
How many chromosomes does each gamete have?
22 and a sex chromosome, either X or Y
What is a haploid cell?
A cell with a single chromosome set
What is the haploid number represented by? What is the haploid number for humans?
n, 23
What happens in fertilization?
Haploid sperm cell from the father fuses with the haploid egg cell of the mother
What is a fertilized egg called? Is the egg diploid?
A zygote, yes
