Download November 23, 2009

November 23, 2009
• TSWBAT compare phenotype and genotype. (7-2.5)
• EQ: How are phenotype and genotype different?
• FF: A student is viewing a specimen on medium power
under a microscope and needs to adjust the focus.
Which part of the microscope would she use?
A.
B.
C.
D.
•
Coarse adjustment knob
Diaphragm
Eyepiece
Fine adjustment knob
HW:Frayer models for today’s vocabulary
Word Parts
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•
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•
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Proto (first)
Phon (sound)
Mono (one)
Viv (life)
Morph (shape)
Character trait of the week
• Loyalty
Cornell Notes
Lesson Title:
PHENOTYPE AND GENOTYPE
Key Points for today
• Vocabulary
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Phenotype
Genotype
Homozygous
Heterozygous
Purebred
Hybrid
• How can I use the genotype to determine what
an organism will look like?
• How can I determine the possible genotype of an
organism from its phenotype?
Vocabulary
• Phenotype – the physical appearance of an
organism
• Genotype – the genes carried by an organism
• Homozygous – an organism with two of the same
alleles for a trait
• Heterozygous – an organism with two different
alleles for a trait
• Purebred – a homozygous organism
• Hybrid – a heterozygous organism
Phenotype and Genotype
How can I determine phenotype from
genotype?
• An organism’s genotype is the combination of
alleles it has.
• An organism with either two dominant alleles
(homozygous dominant) or one dominant and
one recessive allele (heterozygous) would
display the dominant trait.
• Only an organism with two recessive alleles
(homozygous recessive) would display the
recessive trait.