Transcript Weekly Powerpoint - Mrs. Hinds Website

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Learning Target:
Review for Genetics DCA
Science Starter:
Homework #17—Row 5
Supplies:
Genetics Workbook (White)
HW 17(Green)
Genetics Review 4.1(Pink)
HOMEWORK #17—DUE TOMORROW
HOMEWORK #17—DUE TOMORROW
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50 % Long Hair (Ss)
50% Short Hair (ss)
DAILY AGENDA
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Genetics DCA tomorrow!
Homework 17 & Stations are due tomorrow!
Begin Unit 4.1 Genetics Review (15 minutes)
IF you finish then begin Quizzizz (Code:
If you finish Quizziz then you may do the word searches
on pgs. 14 and 19 of your Genetics workbook.)
6. Check Unit 4.1 Genetics Review (as a class)
7. Quizzizz—Game Code
8. Play the games on Mrs. Hinds website in the genetics
section of the website. (Course Organizer, Genetics)
The next slides contain the
answers to the Review!!!
If you are missing
answers…please write
them down!!
1.HEREDITY = THE PASSING OF
TRAITS FROM PARENTS TO OFFSPRING
2. In some countries there is high population of individuals with straight
hair versus curly hair. Explain how heredity contributes in high population
of straight hair vs. curly
• Straight hair is dominant to curly hair and more of
the population has the dominant gene (either they
are hybrid or have purebred dominant alleles). So
more people are reproducing with other people
with straight hair, passing down the genes that
have instructions for straight hair.
3. CATEGORIZE THE FOLLOWING CHARACTERISTICS BELOW AS
BEING INFLUENCED BY GENETICS OR THE ENVIRONMENT
.
Tattoo, sun tan, blue eyes, height, short hair, musician, round face,
blue hair, freckles, talk, walk, dimples
•
Categorize
the following characteristics Influenced
below as being
influenced by genetics or the environment.
Influenced
by genetics
by environment
Tattoo
sun tan
blue eyes
height
short hair
musician
round face blue hair
freckles
talk
walk
dimples
Influenced by genetics
Blue eyes
Height
Round face
Walk
Freckles
Dimples
Influenced by
environment
Tattoo
Talk
Sun Tan
Short hair
Musician
Blue hair
4. A GENE IS FOUND ON A__?___ (CIRCLE YOUR RESPONSE)
NUCLEUS
CELL
CHROMOSOME
5. Which of the following is in the correct order from smallest to largest?
A. Chromosomecellnucleusgene
B. NucleuscellgeneChromosome
C. Genechromosomenucleuscell
D. Cellnucleuschromosomegene
In some parts of the world there are versions of a trait that are more apparent than
others. For example, in a given country there is a higher number of brown eyed people
verses green eyed. How does heredity cause this high frequency or trait?
6.
A. The climate will determine the frequency of the trait over time.
B. People that have the dominant trait reproduce with others who have the same trait and
pass it on to their offspring.
C. The trait is part of the culture so everyone within the culture will have the trait.
D. If one parent has the gene for the trait the offspring will have it regardless of the other
parents trait.
Asexual reproduction is a method of reproduction where offspring arise from a single parent and only inherit that parents genes. Many different seed
plants and animals use one of a variety of asexual methods to reproduce. They find these processes advantageous for a number of reasons;(1) far less
energy is required, (2) stable environments means variability is not as essential, (3) they do not have the trouble of finding a mate (4) If the environment
is particularly harsh, the more delicate or susceptible organs or stages of sexual reproduction may not be able to survive. Many plants which inhabit such
areas as deserts or arctic tundra only reproduce asexually.
Before a cell divides, its nucleus divides. Each chromosome is copied and each nucleus receives the same genetic material; genes, made of
DNA found on chromosomes. As each cell divides into two, the resulting “daughter” cells are therefore exact copies of one another.
This process is responsible for the increase in number of cells which occurs during normal growth and development, and when tissues are
replaced following injury. Normal body cell division is also the basis for asexual reproduction. Only one type of cell is involved, with no input
from another individual. Because no new genetic material is introduced, there is no variation in the resulting offspring. Having no genetic
variation can be very devastating to an organism or colony. If the organism(s) lack the genetics to function in a changed or changing
environment, they will all die. Genetic variation increases a species probability of adapting and surviving change.
7. What are the advantages and disadvantages of
asexual reproduction?
-
Advantages to Asexual Reproduction:
- Less energy required
- No trouble finding a mate
A single individual can produce offspring in a short period of time
Disadvantages to Asexual Reproduction:
- No genetic variation, means the organism(s) cannot adapt to change
or changes in the environment
Sexual Reproduction
In contrast to asexual reproduction sexual reproduction introduces variation into offspring.
This is an essential feature in order for evolution to take place. As a result, this allows for
natural selection to occur for the reason that the adaptations that allow a specific organism
to become better adapted to its environment will survive, thus this beneficial mutation will
be passed to its offspring, and those lacking the adaptation are less likely to survive. This is
attributed to the reason that offspring as a result of asexual reproduction contain the
identical genetic information from their parent as they are essentially a clone. Contrarily,
this can also be an advantage for organisms that reproduce asexually. Beneficial mutations,
or adaptations, that occur in a parent will be passed onto their offspring, the cause of
bacterial resistance.
8. What are the advantages and disadvantages of sexual reproduction?
Advantages to Sexual Reproduction
-GENETIC VARIATION and the organism are more able to survive
environmental changes
Disadvantages to Sexual Reproduction
-Takes time and energy to find a mate
9. COMPLETE THE VENN DIAGRAM BY PLACING THE WORDS OR PHRASES PROVIDED IN
THE CORRECT LOCATION.
Disease may affect all
Slower reproduction process
2 parents
Basis for evolution
genetic variation
useful in ideal growth conditions
quick reproduction cycle
bulb plants
Asexual Reproduction
-Disease may affect all
- 1 parent
- Useful in ideal growth conditions
-Genetically identical
-Quick reproduction cycle
-Bulb plants
1 parent
genetically identical
produces offspring
flowering plants
Sexual Reproduction
Produces
Offspring
-Genetic Variation
-Slower reproduction process
-2 parents
-Basis for evolution
- Flowering plants
15
The table blow depicts data that was collected on a form of insect that can produce
sexually and asexually. The three different containers began with one male and female
insect. Overtime an offspring was born.
10. Identify the form of reproduction that took place by analyzing the data provided for each container A, B, and C.
Provide evidence that supports your claim of sexual or asexual reproduction.
Container A: Asexual
Evidence: Has color, leg size and antenna parts ALL from Female
Container B: Sexual
Evidence: Has color from Female and the leg size and antenna parts from the Male
Container C: Asexual
Evidence: The offspring has ALL the traits of the female parent.
11. If the environmental conditions changed for the aphid,
and food resources were decreasing, which form of
reproduction would be beneficial for the aphid to increase is
species chances of survival? Explain Why.
a. Sexual reproduction to reduce number of offspring due to lack of resources
allowing them to survive.
b. Plus there would be increased diversity of the offspring through sexual
reproduction.
PUNNETT SQUARE PRACTICE:
12.Black fur(B) in guinea
pigs is dominant over
white fur(b). Find the
b probability of a
white offspring in a
cross:
Bb x bb
B
b
b
b
Bb
bb
Bb
bb
50% White fur
18
PUNNETT SQUARE PRACTICE:
13. If two parents are
heterozygous/hybrid
for a genetically
inherited dominant
trait, what is the
probability that they
will have a child
together who has this
trait in his or her
phenotype?
75%
B
B
b
b
BB
Bb
Bb
bb
19
F
14. If blue feathers were
dominant (F) to yellow feathers
(f) in birds of paradise. What
would the genotypes of two
blue birds be?
Ff x Ff
F
f
f
FF
Ff
FF
ff
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Closing—Did we hit our learning target?
Exit Ticket
Any remaining time you may work on the following
• 1. Quizzizz
• 2. Genetics games on Mrs. Hinds Website
• 3. Workbook pages 14 or 19
Exit Ticket--Answers