This PowerPoint presentation will serve as a guide through an engaging lesson on Mendelian genetics and heredity.

1. 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
 Group assignments (by me, pre-determined)
 Classwork page: complete together
 Bean-otype lab activity: complete in small groups
 Discuss lab as class
 Homework will be independent practice on genotypes, phenotypes, & Punnett squares
 Exit ticket
 Also turn in lab pages upon exiting
schedule

2. 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

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

4. cell division
mitosis and meiosis
5-alive recap

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

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

7. Mitosis M
ei
o
si
s
Meiosis
D
a
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g
h
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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
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Diff r
to
ere e
the
nt n
par
ent t
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cell and each other
cell
and el
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oth n
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Fun
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ctio
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this
o
typ
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e of
h
cell
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divi
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sio
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Genetic information Full complement Half
G
e
n
e
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c
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f
in daughter cells:
o
r
m
a
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in H
d al
_____
a f
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:
_
_
_
_
_
Function of this Embryonic develoment Production of gametes
type of cell division Growth
Replenishment of cells
Repair after injury
differences

8. meiosis

9. ovum and sperm production

10. zygote formation

11. genes

12. Objectives
 By the end of today’s lesson, students will be able to
discuss Mendelian genetics & heredity using scientific
vocabulary with 85% 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, with
85% accuracy, that the sorting and recombination of genes
that occurs during fertilization leads to genetic variation
among offspring by completing a lab activity.
objectives

13.  BrainPOP video
Tim and Moby on heredity

14. 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

15. 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…

16.  Group 1:  Group 4:
Andre, Irma, Nevia Quincey, Rudis, Sophie
 Group 2:  Group 5:
Juan, Kai, Lilli Tarik, Simon, Scott
 Group 3:  Group 6:
Malini, Miguel, Anthony Tammika, Tonya, Victor
groups

17.  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

18. Today’s activity!
 To observe and understand the genetic
variation among offspring we will complete
an activity to simulate the sorting and
recombination of genes that occurs during
fertilization.
http://betterlesson.com/unit/1114/070-
genetics?from=profile#/document/9018/offspringratios
 Students will work in groups assigned by me.
bean-otypes 

19. Supplies for each group
 2 bags of beans
 Please have 1 group member pick up beans from lab
supply table in back of room
 Lab sheets (found in your handout
package)
 Pen or Pencil
supplies

20.  The beans represent the gene for fur color
in rats.
 Black=B
Black is dominant
 Red=b
Red is recessive
bean-otypes

21. Methods:
 To be completed collaboratively
 Work in small groups
 Discuss results as a class
 See the lab activity “Offspring, offspring,
everywhere” for complete directions (in
handout package)
methods

22. Results
 Each member of the group will fill in their
own results table and write the answers to
the results questions.
 We will discuss results as a class
 Labs will be turned in at the end of class
results

23.  If your group finishes the bean-otype lab
early, please review the vocabulary list
and quietly discuss the terms with your
group members.
if you finish early…

24.  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

25.  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
 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