Science Flashcards
(89 cards)
Heredity def
the passing of traits from parents to offspring
DNA def
the molecule that carries genetic information for the development and functioning of an organism
Three parts of neucleotides
Phosphate group
Nitrogenous base
Pentose sugar
What does DNA stand for
deoxyribonucleic acid
Trait def
physical characteristic that can be passes from one generation to another
what is the basic sub-unit of DNA
nucleotides
What is a nucleotide
the basic unit (monomer) of DNA
What is DNA
the ‘code for life’ used by all living things (a blue print of you genetic traits)
What does DNA contain
all the info for all the reactions and structures in living things, ensuring that the info can be passed on to the next generation
a section of DNA that codes for a specific trait (a specific stretch of nucleotides - recipe) is called a
gene
can gene codes for a trait be seen or unseen
both
example of a gene code for a trait
hair colour
Who discovered the structure of DNA
Roslind Franklin, Maurice Wilkins, Fransis Crick and James Watson
what shape does DNA have
a double twisted ladder called a double helix
Genetics def
study of heredity
what are nitrogenous bases made of
either adenine and thymine or guanine and cytosine
who am I? my role is to give each organism their own personal genes and traits.
DNA
Adenline always matches with
thymine
Cytosine always matches with
guanine
what is a chromosome
packed and organised DNA collied up to form an x shaped bundle
what is a geneome
the complete set of genes or genetic material present in a cell or organism
How many chromosomes do each person have
46, 23 from mother, 23 from father
The process where sperm and egg cells fuse together to form a new individual is called
fertilisation
how much genetic info is required from the egg and sperm cells to make a new individual
half