Download Friday, March 27, 2009 - Answer Sheet

SBI3U – Assigned Homework
Friday, March 27, 2009 – Answer Sheet
Read Section 6.1:
Key terms:
The Origins of Genetics (pages 154-160)
Genes vs Alleles
Heredity
Phenotypes vs Genotypes
Purebred
P Generation vs F1 Generation vs F2 Generation
Dominant vs Recessive Traits
Heterozygous vs Homozygous
Mendel’s 2 Laws:
1st – The Law of segregation
2nd – The Law of Independent Assortment
Monohybrid Cross vs Dihybrid Cross
Answer Page 160:
Understanding Concepts:
Applying Inquiry/Communication Skills:
2, 3, 4, 5, 7
8
Read Section 6.2:
Key terms:
Define:
Genetic Analysis (pages 160 – 167)
Punnett Square
Sutton-Boveri Hypothesis
Chromosome theory of heredity
Monohybrid vs Dihybrid crosses
Test Cross
Punnett Square
What is a Punnett Square used for?
The following diagram is the basic Monohybrid Punnett Square:
Using the Punnett Square below, what offspring would be expected and their ratios (and percentages) from
the following cross:
A Heterozygous Smooth Seed Shape Plant with a Heterozygous Smooth Seed Shape Plant
Describe the Chromosomal Basis of
TT
Tt
Tt
tt
Heredity
Using the Punnett Square below, what offspring would be expected and their ratios (and percentages) from
the following cross:
Homozygous Smooth Seed Shape, Heterozygous Tall Plant
SSTt
Gametes:
ST ST St St
with
Heterozygous Smooth Seed Shape, Homozygous Short Plant
Sstt
Gametes:
St St st st
Where:
Smooth Seed Shape ( S ) is dominant to Wrinkled ( s );
Tall ( T ) plants are dominant to Short ( t )
SSTt
SSTt
SSTt
SSTt
SStt
SsTt
SsTt
Sstt
Sstt
SsTt
SsTt
Sstt
Sstt
What is a Test Cross? Why is a Test Cross performed?
Answer Page 160:
Understanding Concepts:
Applying Inquiry/Communication Skills:
2, 3
6 a & b, 7 a - c, 8 a - d, 9 a – c, 10
SStt
SStt
SStt
Read Section 6.2:
Key terms:
Define:
Genetic Analysis (pages 160 – 167)
Punnett Square
Sutton-Boveri Hypothesis
Chromosome theory of heredity
Monohybrid vs Dihybrid crosses
Test Cross
Punnett Square
What is a Punnett Square used for?
The following diagram is the basic Monohybrid Punnett Square:
Using the Punnett Square below, what offspring would be expected and their ratios (and percentages) from
the following cross:
A Heterozygous Smooth Seed Shape Plant with a Heterozygous Smooth Seed Shape Plant
Describe the Chromosomal Basis of Heredity
Using the Punnett Square below, what offspring would be expected and their ratios (and percentages) from
the following cross:
Homozygous Smooth Seed Shape, Heterozygous Tall Plant
with
Heterozygous Smooth Seed Shape, Homozygous Short Plant
Where:
Smooth Seed Shape is dominant to Wrinkled;
Tall plants are dominant to Short
What is a Test Cross? Why is a Test Cross performed?
Answer Page 160:
Understanding Concepts:
Applying Inquiry/Communication Skills:
2, 3
6 a & b, 7 a - c, 8 a - d, 9 a – c, 10