Chapter 4 - Reproduction
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What is the endocrine system
Glands that secrete hormones into the blood stream
What is the purpose of a negative feedback loop
Maintains steady body state
How are type I and type II diabetes caused
Type I - Pancreas doesn’t produce insulin Type II - Body doesn’t respond to insulin produced
Name three endocrine system glands and their function
Pituitary - Growth in children Thyroid - metabolism Pancreas - Blood glucose levels Adrenal - Prepares body for stress Ovaries - menstrual cycle Testes - Sperm production
Where is oestrogen and testosterone produced
Ovaries and testes
Where is FSH produced
Pituitary gland
What is IVF
It is treatment for infertile women
What is variation
The difference in characteristics between individuals
What is mutation
The change in a dna sequence
What is selective breeding
Breeding plants/animals for a specific characteristic
What are genotypes and phenotypes
Genotypes are genes and phenotypes are the characteristics the gene causes
What is genetic engineering
Changing a genotype to get a specific phenotype
What are two differences between sexual and asexual reproduction
Sexual = 2 parents and meiosis for cell division Asexual = 1 parent and mitosis for cell division
2hat is meiosis
The cell division that takes place in reproductive organs where 50% of chromosomes are replicated from both parents
Which type of allele take priority
Dominant over recessive
What is one way of predicting a genetic outcome
Punnet squares