Biology Flashcards
Dominant alleles
Are always expressed even if 1 alleles is more dominant like for example BB and bb.
Recessive allelles
Are only expressed if there are 2 repeated/recessive allelles for example bb.
Homozygous alleles
The alleles are the same.
Heterozygous alleles
The alleles are different.
Gene is height
Dominant allele:H
Recessive allele:h
How many chromosomes are in your body.
46 (23 pairs) 1/2 from Mum and other 1/2 from Dad.
What does allele mean?
A different form of gene.
When an egg cell is fertilized what happens?
The number of chromosomes double.
How many chromosomes does a sperm cell have?
23
How many chromosomes does an egg cell have?
23
What are chromosomes?
Long strand of DNA which contains many genes.
What is a gamete?
A Reproductive cell:Sperm cell and egg cell
What is a genotype?
The genetic makeup of an individual characteristics.
The definition of a phenotype?
The physical appearances of 1 induvidual characteristics.
