Key Words Flashcards
What is Deoxyribonucleic acid (DNA)
Is the molecule in the nucleus that carries our genetic code.
How many chromosomes are in an egg
23 chromosomes
How many chromosomes are in a sperm
23 chromosomes
How many Chromosomes are in an zygote
46 in 23 pairs
How many Chromosomes are in a embryo
46 in 23 pairs
What do x and y stand for
Male and female
What does Chromosome mean
A length of DNA
How are Chromosomes arranged
In pairs
What are the coding regions called
Genes
True or False :Genes are big sections of chromosomes (DNA) that code for a particular characteristic
False
What does the sequence of amino acids make
specific protein.
What is an allelel
An allele is a different/alternate form of a gene.
E.g. if the gene is eye colour the alleles could be:
Brown allele
Blue allele
Green allele
What is the two different types of allele
Homozygous alleles
And
Heterozygous alleles
True or false :Dominant alleles are always expressed if they are present
True
What is Asexual reproduction
Asexual reproduction is a method of reproducing without sex and therefore with out sex cells.
What is the simplest form of a method of Asexual reproduction
The simplest form of Asexual reproduction is binary fission.
What are the two individuals for Sexual reproduction
production and fusion of sex cells
