1
How many chromosomes do humans have?
46
What is the hereditary material found in the nucleus of a cell?
DNA
what is the longest phase of the cell cycle
interphase
what does "meta" mean ?
middle
describe the two new daughter cells
they are smaller
they are identical
What do we measure with a triple-beam balance?
mass
What is chromatin?
uncoiled DNA
during which phase does the DNA condense and form chromosomes that we can see?
prophase
How does cytokinesis differ in plants and animal cells?
plants for a new cell wall or plate between the two new daughter cells,
animals pinch apart
if a somatic cell has 46 chromosomes, how many chromosomes are in a human sperm cell?
23
what is a karyotype?
a picture of someone's chromosomes
How is a chromosome different from chromatin?
a chromosome is condensed DNA where chromatin is uncoiled DNA
which stage does the nucleus begin to disappear?
prophase
What is created after mitosis? during cytokinesis
2 new identical daughter cells
Put these in the correct order:
organism, cell, organ, tissue, organ system
cell - tissue - organ - organ system - organism
what genetic disorder is caused by an extra chromosome on pair #21 ?
Down Syndrome
What is the behavior of nerve and brain cells regarding the cell cycle?
they remain in interphase forever
which stage are the chromosomes lined up down the middle of the cell?
metaphase
what is the purpose for MEIOSIS
to produce sperm or eggs
What four phases are specifically MITOSIS ?
prophase, metaphase, anaphase, telophase
What do we use a ruler or meter stick to measure?
length
What does DNA stand for?
deoxyribonucleic acid
What happens to the centromeres during anaphase?
the break away and release the chromosomes
Who is the Father of Genetics ?
Gregor Mendel
how many chromosomes does a cat have ?
32