Reproduction Flashcards
What is the male gamete used in sexual reproduction in animals
sperm
What is the male gamete used in sexual reproduction in plants
pollen nucleus
What is the site of fertilisation in plants
Ovule
What is the site of fertilisation in animals
Fallopian tubes
What is the name of the small protein molecules that are transferred from the mother to the fetus?
Antibodies - they help with immunity
Why do sperm cells have lots of mitochondria
Energy for respiration
If the baby is male, what sex chromosomes will he have
XY
Define DNA
A double-stranded polymer wound to form a double helix that carries the genetic code.
Define fertilisation
The fusion of the nuclei of male and female gametes. It restores the full chromosome number.
Define gene
A section of DNA that codes for a specific sequence of amino acids which undergo polymerisation to form a protein.
Define heterozygous
when someone has two different alleles
Define homozygous
when someone has two identical alleles
Define meiosis
a form of cell division that produces gametes which are non-identical cells with half the usual chromosome number
Define testosterone
the main male reproduction hormone produced by the testes and stimulates sperm production
