Test Revision Cards Flashcards
Revise for the DNA & Fertilisation Test (23 cards)
What does “Sexual Reproduction” mean?
Two parents are involved
What does “Asexual Reproduction” mean?
only one parent
What do we call the specialised sex cells?
GAMETES - Sperm cell (male) and Egg (female)
How many chromosomes does the male sex cell (“gamete”) contain?
23
How many chromosomes does the female sex cell (“gamete”) contain?
23
Name the parts of the male reproductive system
Name the parts of the female reproductive system.
Name the part of the female reproductive system which produces the female gametes
Ovary
Name the part of the male reproductive system which produces the male gametes
Testes
What happens, in terms of gametes, when fertilisation takes place
nucleus of the Sperm (male gamete) fuses with the nucleus of the Egg (female gamete)
What do we call the FERTILISED egg?
ZYGOTE
What do we call the process of cell division to produce an embryo and then a foetus?
MITOSIS
Where is the female reproductive system does the foetus develop?
UTERUS
Name the tube which connects the foetus to the placenta.
UMBILICAL CORD
Name the bag of fluid which protects the foetus.
AMNIOTIC SAC
Where in the cell are Chromosomes found?
Nucleus
Name the smaller material that the chromosomes are made up of
DNA
How many chromosomes do humans have?
How many come from each parent?
46
23 from each parent
What is meant by the word Genes?
Sections of chromosomes which control certain characteristics.
Some of our characteristics come from our genetics (inherited characteristics) and some come from the ___________. Some characteristics come from a mixture of both!
Environment
Give two uses for DNA profiling
- crime investigation
- paternity testing
Give one advantage of a national DNA database
Crimes solved quickly and easily
Give one disadvantage of a national DNA database
Invasion of privacy
