Homework #1 due 2/7 Bonus #1 due 2/28. CB 17.4 Combinations of 3 nucleotides code for each 1 amino...
-
Upload
peter-hall -
Category
Documents
-
view
215 -
download
1
Transcript of Homework #1 due 2/7 Bonus #1 due 2/28. CB 17.4 Combinations of 3 nucleotides code for each 1 amino...
CB 5.25Genes contain the information to make RNA and/or proteins.
The information in genes is what to make and when to make it.
Protein
Twin studies have been used to determine the heritability of various traits, but there
are some caveats.
Correlation of weight (BMI) %
Biological siblings 34
Parents and children living together 26
Identical twins reared together 80
Fraternal twins reared together 43
Identical twins reared apart 72
Adopted children and parents 4
Unrelated children living together 1
*But food preference shows little genetic correlation
Correlation of weight and relatedness
IntelligenceCorrelation of IQ Inheritance : %
The same person tested twice 87
Identical twins reared together 86
Identical twins reared apart 76
Fraternal twins reared together 55
Biological siblings 47
Parents and children living together 40
Parents and children living apart 31
Adopted children living together 0
Unrelated people living apart 0
When the environment is equal (everyone has access to resources), genetic differences are magnified.
When environments are different (only a few have access to
resources), environmental differences are
magnified.
Proof or disproof?Correlation of IQ Inheritance : %
The same person tested twice 87
Identical twins reared together 86
Identical twins reared apart 76
Fraternal twins reared together 55
Biological siblings 47
Parents and children living together 40
Parents and children living apart 31
Adopted children living together 0
Unrelated people living apart 0
VolesPrairie
• Monogamous
• Both parents care for young
Montane
• Nonmonogamous
• Mother cares for young briefly
Oxytocin and Vasopressin(hormones)
Water/salt balance
Contraction of womb and milk production
Encourages bonding between individuals
Oxytocin and Vasopressin(hormones)
Water/salt balance
Contraction of womb and milk production
Encourages bonding between individuals
VolesPrairie
• Monogamous
• Both parents care for young
Montane
• Nonmonogamous
• Mother cares for young briefly
VolesPrairie
• Monogamous
• Both parents care for young
Montane
• Nonmonogamous
• Mother cares for young briefly
Same levels of oxytocin and vasopressin
VolesPrairie
• Monogamous
• Both parents care for young
• More receptors
Montane
• Nonmonogamous
• Mother cares for young briefly
• Less receptorsSame levels of oxytocin and vasopressin
VolesPrairie
• Monogamous
• Both parents care for young
• More receptors
• ?
Montane
• Nonmonogamous
• Mother cares for young briefly
• Less receptors
• ?
Same levels of oxytocin and vasopressin
Inject hormone into brain
VolesPrairie
• Monogamous
• Both parents care for young
• More receptors
• Monogamous
Montane
• Nonmonogamous
• Mother cares for young briefly
• Less receptors
• Nonmonogamous
Same levels of oxytocin and vasopressin
Inject hormone into brain
VolesPrairie
• Monogamous• Both parents care
for young
• More oxytocin receptors
• ?
Montane• Nonmonogamous• Mother cares for
young briefly
• Less oxytocin receptors
• ?
Same levels of oxytocin and vasopressin
Block receptors
VolesPrairie
• Monogamous• Both parents care
for young
• More oxytocin receptors
• Nonmonogamous
Montane• Nonmonogamous• Mother cares for
young briefly
• Less oxytocin receptors
• Nonmonogamous
Same levels of oxytocin and vasopressin
Block receptors
VolesPrairie
• Monogamous• Both parents care
for young
• More oxytocin receptors
• Monogamous
Montane• Nonmonogamous• Mother cares for
young briefly
• Less oxytocin receptors
• Monogamous
Same levels of oxytocin and vasopressin
Increase levels of receptors (genetically) in ventral pallidum
Why might these voles use different reproductive strategies?
Prairie voles
• Monogamous
• Both parents care for young
Montane voles
• Nonmonogamous
• Mother cares for young briefly
Why might these voles use different reproductive strategies?
Prairie voles:
Resource poor habitat
• Monogamous
• Both parents care for young
Montane voles:
Resource rich habitat
• Nonmonogamous
• Mother cares for young briefly