Inheritance, varitation and evoloution

  • Created by: LBeb01
  • Created on: 07-05-18 13:46
How many cells are produced at the end of mitosis
2
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How many cells are produced at the end of meiosis?
4
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What are the male gametes in plants?
Pollen
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What are the female gametes in plants?
Eggs
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What is the male gamete in animals
Sperm
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What is the female gamete in animals
Eggs
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What is the basic structue of DNA?
Double Helix
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Define gene
Section of DNA that controls a characterstic
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Define chromosome
long molecule of DNA
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Define allele
Different versions of DNA
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Define dominant
Only needs one allele to be present of phenotype
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Define recessive
2 versions of gene needs to present itself
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Define homozygous
2 identical copies of the gene
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Define genome
all of the DNA within a organisum
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Define gamete
All the DNA of an organisum
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Define hetrozygous
Diffrerent copies of the same gene
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Define genotype
Genes that you have
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Define phenotype
The charasterisics that you have
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What is polydactyly?
When you have extra fingers or toes
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Is polydatyly dominant or recessive?
Dominant
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What is cystic fibrosis?
Build up of mucus in the lungs
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Is cystic fibrosis dominant or recessive?
recessive
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How many pairs of hromosomes in a human body cell?
23
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What sex is **
Female
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What sex is XY
Male
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Define evolution
When species gradually change over time
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Define natural selection
Process by which species evolve
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Define speciation
Devlopement of a new species
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What evidence is there for evolution
The fossil record
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How do fossil arise?
Bones
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Define extinction
A species dying out
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What things lead up to extinction
Increase in predator/hunting, decrease in food or change in the envroment
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Why can baceria evolve quickly?
Because they divide every 20 minitues
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What is MRSA?
Multi drug resistant bacteria
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Why is the development of antiboitics so slow?
Lots of work involved -little incentive for drug companies
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What are the advantages of sexual reproduction?
Variation
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What are the disadvatages of sexual reproduction?
Gene dilution
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What are the advantages of asexual reproduction
Clone, no looking for partner
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What are the disadvatges of asexual reproduction?
Lack of variation
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What is the basic structure of DNA?
Double helix
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What are the bases of DNA?
AT CG
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How does DNA code for amino acids?
Sets of 3 bases - codons
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How do amino acids prodce protiens?
Long strings fold up to make protiens
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How do variations of DNA affect the protien being made?
Protiens mis folding - wrong shape -- Enzymes active site is wrong
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What affect might a mutation have on an enzyme?
Active site is wrong
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What was Darwins theory?
Evolution, gradual changes over time
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What was the controversy behind Dawins theory?
Because it went against God
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What was the Lamaracks Theory?
Characteristics is aquired during a life time and are passed on
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How many cells are produced at the end of meiosis?

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4

Card 3

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What are the male gametes in plants?

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Card 4

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What are the female gametes in plants?

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Card 5

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What is the male gamete in animals

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