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CB 13.5 {Meiosis: producing gametes} Sexual reproduction creates genetic diversity by combining DNA from 2 individuals, but also by creating genetically unique gametes. {Mitosis: producing more cells}
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•Exam #1 F 2/16 in WCH 1.120WCH 1.120(bring cheat sheet)•Review Th 2/15 at 5pm in GRG 102
Sexual reproduction creates genetic diversity by combining DNA from 2 individuals, but also by creating genetically unique gametes.
CB 13.5
{Mitosis:producing more cells}
{Meiosis:producing gametes}
CB 13.9 Differences between mitosis and meiosis
Mitosis only:extremely lowgenetic diversity
Meiosisand Mitosis:greater geneticdiversity
vs.Asexual Reproduction
SexualReproduction
CB 14.4
Gene forblue eye pigment
Gene forbrown hair pigment
Gene forgrowth hormone
Haploidchromosomes
Gene forhemoglobin
Gene forDNA polymerase
CB 14.4
Gene forhemoglobin
Gene forhair color
Gene forgrowth hormone
Allele forblack hair
Allele forblack hair
Allele forlow express(short)
Allele forhigh express(tall)
Allele for normal Hb
Allele forsickle cell Hb
Diploidchromosomes
CB 13.3
Each pair of chromosomes is comprised of a paternal and maternal chromosome
haploid
diploid
X 23in humans X 23
in humans
X 23in humans
Inheritance = The interaction between genes inherited from Mom and Dad.
Do parents’ genes/traits blend together in offspring?
CB 14.10
CB 14.3
In many instances there is a unique pattern of inheritance.
Traits disappear and reappear in new ratios.
CB 14.6 Genotype Phenotype
CB 14.4
Gene forhemoglobin
Gene forhair color
Gene forgrowth hormone
Allele forblack hair
Allele forblack hair
Allele forlow express(short)
Allele forhigh express(tall)
Allele for normal Hb
Allele forsickle cell Hb
Diploidchromosomes
CB 14.6 Genotype Phenotype
CB tbl 14.2Human blood types
One gene with three alleles controls carbohydrates that are found on Red Blood Cell membranes
RBC
A A
A
AA
A
AA
A
RBCRBC
B B
B
BB
B
BB
B
Allele A = A carbs Allele B = B carbs Allele O = no carbs
CB tbl 14.2
Human blood types CB tbl 14.2
RBC
A A
A
AA
A
AA
A
We each have two versions of each gene…
So
Genotype could be A and AORA and O
RBC
A A
A
AA
A
AA
A
Recessive alleles do not show their phenotype when a dominant allele is present.
Genotype could be A and AORA and O
What about…
Genotype = ??
RBC
What about…
Genotype = OO
RBC
RBC
AA
A
BA A
B
B
B
What about…
B
RBC
AA
A
BA A
B
B
B
What about…
B
Genotype = AB
Human blood types
AA orAO
AB
BB orBO
OO
CB tbl 14.2
If Frank has B blood type,
his Dad has A blood type,
And his Mom has B blood type…
Should Frank be worried?
possible
genotypes
Mom=B blood
BB or BO
Dad=A blood
AA or AO
Gametes all B / 50% B and50% O
all A / 50% A and50% O
possible
genotypes
Mom=B blood
BB or BO
Dad=A blood
AA or AO
Mom=B blood
BB or BO
Dad=A blood
AA or AO
Gametes all B / 50% B and50% O
all A / 50% A and50% O
possible
genotypes
Frank can be BO= B blood …no worries
Mom=B bloodBB or BO
Dad=A bloodAA
Gametes all B / 50% B and50% O
all A
possible
genotypes
Frank can be BO or BB= B blood …Uh-Oh
GrandparentsAB and AB
CB 14.3
In many instances there is a unique pattern of inheritance.
Traits disappear and reappear in new ratios.
haploid
diploid
X 23in humans X 23
in humans
X 23in humans
Inheritance = The interaction between genes inherited from Mom and Dad.
•Exam #1 F 2/16 in WCH 1.120WCH 1.120(bring cheat sheet)•Review Th 2/15 at 5pm in GRG 102
