The first lesson in a series on Mendelian genetics and heredity. This PP is meant to serve as a guide/framework for the lesson.

1. Mendelian Genetics & Heredity
Lesson 1: Introduction, vocabulary, Punnett squares

2. Today’s schedule
 Pick-up daily notes
 Complete the warm-up: Mitosis and meiosis are both forms of cell division. Please
list and/or describe 1 similarity and 2 differences between them.
*The warm-up will be displayed on the smartboard as students enter.
 Discuss the warm-up.
PowerPoint begins at this point:
 5-Alive Recap: Lively 5 minute review/recap of previous lesson
*if this goes over 5 min that is fine
 Introduce today’s topic and objectives (will be written in hand-out as well as on
whiteboard)
 BrainPOP video
 Vocabulary review
 Classwork page: complete together
 Homework will be independent practice on genotypes, phenotypes, & Punnett
squares
 Exit ticket
schedule

3. MSDE (2012):
INDICATOR
3.3.2 The student will illustrate and explain how expressed traits
are passed from parent to offspring.
Assessment limits:
 phenotypes (expression of inherited characteristics)
 dominant and recessive traits
 sex-linked traits (X-linked only; recessive phenotypes are more
often expressed in the male)
 genotypes (represented by heterozygous and homozygous pairs
of alleles)
 Punnett square (use to predict and/or interpret the results of a
genetic cross; translate genotypes into phenotypes - monohybrid
only)
 pedigree (use to interpret patterns of inheritance within a family)
common core

4.  Mitosis
and meiosis are both
forms of cells division.
 Pleaselist/describe
1 similarity & 2 differences
between them.
warm-Up

5. cell division
mitosis and meiosis
5-alive recap

6.  Mitosis: Parent cell (n) creates identical
daughter cells (n)
 Mitosis occurs all over
 Mitosis creates all types of cells
mitosis

7.  Meiosis: Parent cell (2n) creates unique
daughter cells (n)
 Meiosis only occurs in gonads
 Meiosis only creates sex cells
meiosis

8. Mitosis M
ei
o
si
s
Meiosis
D
a
u
g
h
t
e
r
c
el
ls
a
r
Daughter cells are Identical Different
e
_
_
Mei _
osis _
Dau _
ght t
Di
er o
ff
t
_____ to the parent
cell e
s h
r
are e
e
___ p
nt
__ a
Diff r
to
ere e
the
nt n
par
ent t
c
cell and each other
cell
and el
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oth n
er d
e
Fun
a
ctio
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n of
h
this
o
typ
t
e of
h
cell
e
divi
r
sio
n
Genetic information Full complement Half
G
e
n
e
ti
c
in
f
in daughter cells:
o
r
m
a
ti
o
n
in H
d al
_____
a f
u
g
h
t
e
r
c
el
ls
:
_
_
_
_
_
Function of this Embryonic develoment Production of gametes
type of cell division Growth
Replenishment of cells
Repair after injury
differences

9. meiosis

10. ovum and sperm production

11. zygote formation

12. genes

13.  By the end of today’s lesson, students will be able to
discuss Mendelian genetics & heredity using scientific
vocabulary with 75% accuracy by practicing it in small
groups.
 By the end of today’s lesson students will be able to
explain the relationship between meiosis & heredity with
85% accuracy by viewing a PowerPoint presentation.
 By the end of today’s lesson students will understand how
to create and use a Punnett square for monohybrid crosses
with 85% accuracy.
objectives

14.  BrainPOP video
Tim and Moby on heredity

15. kittens on vocabulary

16. Genotype: The 2 alleles inherited for a particular gene (the code)
Phenotype: Observable traits (outward expression of the genotype)
Allele: One of two or more versions of a gene
Trait: A specific characteristic of an organism which can be
determined by genes or the environment, or more commonly by
interactions between them
Gene : The basic physical unit of inheritance. Genes are passed from
parents to offspring and contain the information needed to specify
traits; found on chromosomes.
crucial vocabulary

17. Dominant vs. Recessive: Individuals receive two versions of each gene, known as
alleles, from each parent. If the alleles of a gene are different, one allele will be
expressed; it is the dominant gene. The effect of the other allele, called recessive, is
masked.
Homozygous: An individual inherits the Heterozygous: An individual inherits
same alleles for a particular gene from different alleles for a particular gene
both parents. from each parent.
Pedigree: A genetic representation of a
Punnett square: A diagram used to family tree that diagrams the
determine possible phenotypes. inheritance of a trait or disease though
several generations
Inherited trait: One that is genetically determined. Inherited traits are passed from
parent to offspring according to the rules of Mendelian genetics. Most traits are not
strictly determined by genes, but rather are influenced by both genes and environment
a few more terms…

18.  We will complete the classwork page
collaboratively (found in handout
package):http://betterlesson.com/document/4853/pra
ctice-problems-on-genotypes-and-
phenotypes?from=interllective
classwork/new content

19.  found in your handout package
http://betterlesson.com/document/4855/punnett-squares-and-
heterohomozygous-practice?from=search#/document/4832/homework-
on-genotypes-and-phenotypes
homework

20.  BrainPOP (1999-2012). Heredity. Retrieved from http://www.brainpop.com/
 Brooklyn College (Publisher). (2000-2012). Gene sorting (Image). Retrieved from
http://lc.brooklyn.cuny.edu/smarttutor/corc1321/meiosis.html
 IUPUI Department of Biology (Publisher). (2000, February 16). Zygote formation
(Image). Retrieved from http://www.biology.iupui.edu/biocourses/N100H/ch9meiosis.html
 MSDE. (2012). Core learning goals for biology. School Improvement in Maryland.
Retrieved from http://mdk12.org/instruction/clg/biology/goal3.html
 Ovum and sperm production (Image). Retrieved from
http://rushartsbiology.wikispaces.com/Visuals+-+Unit+5
 Schmidt, A. (n.d.). Kittens (Image). Retrieved from
http://uhaweb.hartford.edu/aschmidt/
 Tamarkin, D.A. (Writer). (2011). Differences between Meiosis and Mitosis (Image).
Retrieved from http://faculty.stcc.edu/AandP/AP/AP2pages/reprod/sexcells.htm
 Tamarkin, D.A. (Writer). (2011). Meiosis (Image). Retrieved from
http://faculty.stcc.edu/AandP/AP/AP2pages/reprod/sexcells.htm
references