673220
Descrição
Mapa Mental por plusterianne, atualizado more than 1 year ago
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Criado por plusterianne
mais de 10 anos atrás
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B1: You and your genes
- Most cells in your body have a
nucleus- and it's the nucleus that
contains your genetic material
- The genetic material in the nucleus
is arranged into Chromosomes. The
human cell nucleuscontains 23 pairs
of Chromosomes.
- Each Chromosome is one very long molecule
of DNA that's coiled up(the coiling gives
chromosomes their shape.
- A gene is a short length of a chromosome.
- Genes control the development of different
characteristics, e.g, hair colour, and how an organism
functions
- Genes can exist in different versions. Each version gives a different form of a
characteristic like blue or brown eyes. The different versions of the same gene are
called alleles.
- Genes are instructions for cells
- Each gene is a code for making a cetain
protein
- Having different versions of proteins means
that we end up with different characteristics
- Some proteins are structural proteins. they ate patr
of things like hair, skin and blood and the
cytoplasm in out cells.
- Other proteins are functional proteins- for example. enzymes
are proteins that help with digestion by breaking down food
molecules.
- Each gene is a code for making a cetain
protein
- Organisms genotype describes the genes its got
- Organisms genotype are all the genes it has. The
Characteristics that an organism displays are called
its phenotype.
- Some characteristics such as dimples are controlled by genes alone.
- Other characteristics- scars. are controlled by environmental factors
- There are also other characteristics that are controlled by both genes and environmental factors
- Organisms genotype are all the genes it has. The
Characteristics that an organism displays are called
its phenotype.
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