Max Lee-
Asexual reproduction has genetically identical offspring because
one parent, no fusion of gametes
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Sexual reproduction has variation in offspring because
two parents, fusion of gametes and mix of genetic info
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Meiosis step by step
All chromosomes are copied
Cell divides in two
both of these cells divide into two
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Meiosis halves/doubles number of chromosomes
halved the number of chromosomes
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dna consists of x strands
two strands
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double helix
two strands wrap around eacother
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gene
small section of DNA on a chromosome
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benefits of studying human genome
search for genes linked to disease
understand inherited disorders
trace human migration patterns from the past , helps with ancestry
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alleles
different versions of a gene
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genotypes
The alleles that an organism has for a particular characteristic
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phenotypes
characteristics caused by the alleles
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cystic fibrosis reccessive/dominant AND what it is
recessive allele , defective cell membrane
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polydactyly reccessive/dominant AND what it is
dominant allele, extra fingers or toes
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3 problems with embryo screening
expensive
large number of embryos created, small are used. so lots are destoreyd
future we can screen them to produce desired offspring. unethical
