Dna and genes Flashcards
What is a cell
Cell are the smallest unit of life and the building blocks of all living things
What does Dna stand for
Deoxyribonucleic Acid
What is dna
Is a substance found in all living things that contain its genetic information
Where is dna located
In the nucleus of a cell
what is a gene
a gene is a segment of dna that encodes a traid eg hair color or blood group
what is dna organised into
chromosomes
What is a chromosome
A chromosome is a threadlike structure inside a nucleus of a cell that contains Dna that carries genetic information
how many chromsomes do humans have
humans have 46 chromosomes , 23 from dad and 23 from mother
what can chromsomes be divided into
autosomes and sex chromosomes
what can sex chromsomes be further divided into
x chromosomes and y chromsomes
what is autosomes
autosomes are the chromosomes thar determine somatic characters such as body weight ,length tc
what are sex chromsomes
the chromsomes that determine the sex of an organism
distinguihs between x and y chromsomes
x and y chromsomes are two types of sex chromosomes. Females have two x chromsomes and males have and x and a y chromsome
