Download B1: You and Your Genes

B1: You and Your Genes
Part 1: how the genome and the environment affect an organism’s features
I know that.......
the genome is the entire genetic material of an organism and a copy of
the genome is present in every cell to control how it functions
that the genome is packaged into chromosomes, which are made of
DNA – a polymer of nucleotides, forming two strands in a double helix
that genes are sections of DNA, and instruct cells how to make proteins
from amino acids
that most of an organism's features depend on instructions in the
genome and can be modified by the environment
the genotype of an organism is the genetic information it has
Done
Revised
Understood
Done
Revised
Understood
the phenotype is the feature or features that result from this
combination and interaction with the environment
Part 2: how genetic information is inherited
I know that.......
that the two versions of each gene in a pair of chromosomes are called
alleles
alleles can be the same (homozygous)
alleles can be different (heterozygous)
that a different version of a gene is a genetic variant
how the sequence of bases in DNA is the genetic code for making
proteins
genetic variants arise from mutations, and how they can affect the
phenotype of an organism
about dominant and recessive alleles, and that the recessive allele in a
heterozygous pair will not show its associated feature in the phenotype
how to use simple models (Punnett squares and family trees) to explain
and make predictions about the inheritance of single genes
that most of an organism’s features are affected by multiple (rather than
single) genes, other regions of the genome, and the environment
how sex is determined by the sex chromosomes
Part 3: the benefits of some different types of gene technology, and issues that arise from these
technologies.
I know that.......
how gene technologies such as genetic testing, pre-implantation genetic
diagnosis, and genetic engineering could be helpful in medicine and
agriculture
about risks, ethical issues, and practical issues that arise from gene
technologies.
Done
Revised
Understood
Before the GCSE examination I will meet the following targets:
1.
2.
The areas I need help to understand are:
1.
2.
3.