Science

?
  • Created by: tyndsei
  • Created on: 16-05-16 13:36
Why can people look like their parents/siblings but not identical to them?
Chromosomes in a pair carry same genes in the same place but are different versions of genes (alleles). Individuals have two alleles for each gene (either homo/hetero). During SR, genes from both parents come together and produce variation in offspr-
1 of 10
Compare natural selection and selective breeding?
Similarities; ways of breeding animals/plants - produce changes in characteristics - rely on variation in individuals - select most favourable characteristics1 - 1 are passed onto offspring. Differences; NS occurs naturally & SB controlled by humans
2 of 10
What do parents need to consider before deciding whether to have a test for their baby?
Risk of miscarriage. Risk of infection. harmful towards fetus. Debating to terminate/abort. Test is not 100% accurate.
3 of 10
What are clones?
an organism or cell, or group of organisms or cells, produced asexually from one ancestor or stock, to which they are genetically identical.
4 of 10
How are clones created in animals?
Twin fertilised zygote separates, both halves develop into an individual (naturally).
5 of 10
Human activity can have an unintended impact direct impact on the environment. How?
Deforestation causes habitat destruction & burning fossil fuels leads to global warming
6 of 10
Explain how evolution produce new species?
Genetic variation; where each population has a wide range of alleles that control their characteristics - Natural selection; where the alleles which help an organism to survive are selected in each population -Speciation; where the populations become
7 of 10
Explain how clothes occur both naturally and artificially?
N - twins; when a fertilised egg cell split A - when the nucleus from a body cell is transferred to an empty egg cell, artificial splitting of embryos
8 of 10
Describe the different types of stem cells?
Unspecialised and Embryonic can develop into many types of cell - Adult cannot develop into all types - Specialisation occurs at an early stage
9 of 10
How can stem cells treat diseases?
Be given to may be replace damaged tissue
10 of 10

Other cards in this set

Card 2

Front

Compare natural selection and selective breeding?

Back

Similarities; ways of breeding animals/plants - produce changes in characteristics - rely on variation in individuals - select most favourable characteristics1 - 1 are passed onto offspring. Differences; NS occurs naturally & SB controlled by humans

Card 3

Front

What do parents need to consider before deciding whether to have a test for their baby?

Back

Preview of the front of card 3

Card 4

Front

What are clones?

Back

Preview of the front of card 4

Card 5

Front

How are clones created in animals?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

Biology
See all Biology resources »See all DNA and inheritance resources »