Download Unit Details Bio 3

Unit Details Bio 3.2 (10/12 thru 10/23)
Conceptual Strand
Evolution and Genetics
Grade Level/Course
High School/Biology
Common Core Essential State Standards
NC Science Essential Standard(s)
Bio 3.2
Understand how the environment, and/or the interaction of alleles, influences the
expression of genetic traits.
Clarifying Objectives
Clarifying Objectives
Number
Standard
Bio 3.2.1
Explain the role of meiosis in sexual reproduction and genetic variation.
Bio 3.2.2
Predict offspring ratios based on a variety of inheritance patterns
(including dominance, co-dominance, incomplete dominance, multiple
alleles, and sex-linked traits).
Bio 3.2.3
Explain how the environment can influence the expression of genetic
traits.
Essential Questions and Big Ideas
Big Ideas



Meiosis is a process where a cell
divides twice with half the DNA in 4
cells in order to support sexual
reproduction. This makes it different
from mitosis.
The process of meiosis allows for
more ways for genetic variation to
occur within daughter cells than
mitosis.
Genetic traits are determined by
many different types of inheritance
patterns; including autosomal, sexlinked, codominance, incomplete
dominance, polygenic and multiple
Essential Questions
1. How does meiosis compare to mitosis?
2. How does meiosis lead to independent
assortment and genetic diversity?
3. What sources lead to genetic variation
in sexually reproducing organisms?
4. How do inheritance patterns influence
offspring ratios?
5. How are genotypic and phenotypic
ratios determined by using Punnett
squares?
6. How are karyotypes used to identify
gender and certain chromosomal


alleles.
abnormalities?
Punnett squares are used to
determine genotypic and phenotypic
ratios for different inheritance
patterns; including autosomal, sexlinked, codominance, incomplete
dominance, and multiple alleles.
7. How can parentage be determined
based on blood type?
Sex-linked traits are carried on sex
chromosomes and males are more
likely to express sex-linked traits.
9. How can pedigrees be used to identify
the genotypes?

Karyotypes are used to interpret
gender and chromosomal
abnormalities in humans.

Pedigrees are used to identify
genotypes and inheritance patterns
of traits based upon phenotypes.

Expression of certain genetic traits
can be influenced by environmental
factors.
8. How can sex-linked traits (colorblindness and hemophilia) be interpreted
using Punnett squares?
10. How does the environment influence
the expression of genetic traits?
Vocabulary
Vocabulary
Objective
Academic
Performance
3.2.1
Meiosis
Explain
Homologous chromosomes
Recall
Haploid
Infer
Diploid
Exemplify
Gamete
Compare
Fertilization
Genetic variation
Crossing over
Nondisjunction
Independent assortment
Gene
Chromosome
Asexual reproduction
Sexual reproduction
3.2.2
Autosomal inheritance
Predict
Blood typing
Intrepret
Codominance
Determine
Colorblindness
Cystic fibrosis
Dominant allele
Recognize
Solve
Understand
Genotype
Genotypic ratio
Hemophilia
Huntington’s disease
Incomplete dominance
Inheritance pattern
Karyotype
Monohybrid
Multiple allele
Pedigree
Phenotype
Phenotypic ratio
Polygenic
Recessive allele
Sex-linked traits
Sickle cell anemia
3.2.3
Lung Cancer
Explain
Oral Cancer
Develop
Skin Cancer
Diabetes
PKU
Heart disease
Gene expression
Environmental factors