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6) Watch this video called Life’s Greatest Miracle and fill out the attached study guide. It is about 54 minutes long. This is an older video with hairstyles and clothing that are a bit dated, but the content is still very relevant.It shows the biological beginnings during fertilization, and the growth of the fetus and embryo.
https://www.pbs.org/wgbh/nova/video/lifes-greatest-miracle/
How many human babies are born each day? _______________________
What is DNA “very good” at?
What risk is there for a species that only reproduces by cloning?
How does the DNA of sexually produced offspring compare to the DNA of the parents?
How long would the tubing in the testicles be if stretched out? __________
How many sperm are produced by the average human male?____________
What process is used to make sperm cells and egg cells? ___meiosis____________
What happens to the genes when two chromosomes “embrace”?
What is the advantage of diversity within a species?
When does a human female make all the eggs in her ovaries? As a fetus
How many sperm does one teaspoon of semen contain? 300 million
What danger confronts sperm in the vagina? The vagina is acidic
What does the sperm need in order to be allowed through the egg’s zona?
How much time passes between fertilization and the first division of the zygote? 24 hours
After fertilization, how long does it take for the blastocyst to arrive in the uterus? About 5 days
What risk does the blastocyst face after it attaches to the uterus? Could be attacked by the mother’s immune system
What does a gene do when it has been turned on?
What hormone does it take to grow a penis? testoterone
Where specifically does the baby get its nutrients from?
How long is the umbilical cord?
Does the blood of the mother and baby ever mix?
How old is the fetus when it gains the ability to hear sound?
What is the main job of the fetus during the last trimester?
By what percent does the mother’s blood supply increase during pregnancy?
How many inches must the cervix open for the baby’s head? 4 inches
What two things do humans have that make delivery harder than for other primates?A large brain and a narrow pelvis
Match up proteins from the sperm to proteins on the egg, sperm sheds its coating which releases an enzyme to make an opening in the egg.
7) Dominant vs. Recessive genes
Watch the following video and use information in your book about dominant and recessive genes.
What is a dominant gene?
What type of letter is used for a dominant gene?
What is a recessive gene?
What type of letter is used for a recessive gene?
Using this graphic chart, pick 5 characteristics that you have, and state whether they are dominant or recessive.
For example I have straight hair and that is a recessive gene.
1.
2.
3.
4.
5.
8)Child Growth and Development Chapter 2 Study guide
Most of the topics in this chapter will be expanded upon in the additional assignments for the week rather than in the study guide.Be sure to read all of both chapters 2 and 3.
Describe the chromosomal abnormality Down Syndrome.
What causes it?
What characteristics are associated with Down Syndrome?
Teratogens
What are teratogens?
List and explain the 5 factors influencing prenatal risks:
1.
2.
3.
4.
5.
List and explain the 4 categories of teratogens:
1.
2.
3.
4.
List and explain the potential effects of at least 3 drugs as teratogens
1.
2.
3.
List and explain the potential effects of at least 2 environmental teratogens
1.
2.
Maternal factors
For women over the age of 35 who become pregnant, what things do they have an increased risk of:
Unformatted Attachment Preview
Child Growth and Development Chapter 2 Study guide
Most of the topics in this chapter will be expanded upon in the additional assignments for the
week rather than in the study guide. Be sure to read all of both chapters 2 and 3.
Describe the chromosomal abnormality Down Syndrome.
What causes it?
What characteristics are associated with Down Syndrome?
Teratogens
What are teratogens?
List and explain the 5 factors influencing prenatal risks:
1.
2.
3.
4.
5.
List and explain the 4 categories of teratogens:
1.
2.
3.
4.
List and explain the potential effects of at least 3 drugs as teratogens
1.
2.
3.
List and explain the potential effects of at least 2 environmental teratogens
1.
2.
Maternal factors
For women over the age of 35 who become pregnant, what things do they have an increased
risk of:
Dominant vs. Recessive genes
Watch the following video and use information in your book about dominant and recessive
genes.
What is a dominant gene?
What type of letter is used for a dominant gene?
What is a recessive gene?
What type of letter is used for a recessive gene?
Using this graphic chart, pick 5 characteristics that you have, and state whether they are
dominant or recessive.
For example I have straight hair and that is a recessive gene.
1.
2.
3.
4.
5.
Watch this video called Life’s Greatest Miracle and fill out the attached study
guide. It is about 54 minutes long. This is an older video with hairstyles and
clothing that are a bit dated, but the content is still very relevant. It shows the
biological beginnings during fertilization, and the growth of the fetus and embryo.
https://www.pbs.org/wgbh/nova/video/lifes-greatest-miracle/
1. How many human babies are born each day? _______________________
2. What is DNA “very good” at?
3. What risk is there for a species that only reproduces by cloning?
4. How does the DNA of sexually produced offspring compare to the DNA of
the parents?
5. How long would the tubing in the testicles be if stretched out? __________
6. How many sperm are produced by the average human male?____________
7. What process is used to make sperm cells and egg cells?
___meiosis____________
8. What happens to the genes when two chromosomes “embrace”?
9. What is the advantage of diversity within a species?
10.When does a human female make all the eggs in her ovaries? As a fetus
11. How many sperm does one teaspoon of semen contain? 300 million
12. What danger confronts sperm in the vagina? The vagina is acidic
13. What does the sperm need in order to be allowed through the egg’s zona?
Match up proteins from the sperm to proteins on the egg, sperm sheds its
coating which releases an enzyme to make an opening in the egg
14. How much time passes between fertilization and the first division of the
zygote? 24 hours
15. After fertilization, how long does it take for the blastocyst to arrive in the
uterus? About 5 days
16. What risk does the blastocyst face after it attaches to the uterus? Could be
attacked by the mother’s immune system
17. What does a gene do when it has been turned on?
18.What hormone does it take to grow a penis? testoterone
19.Where specifically does the baby get its nutrients from?
20. How long is the umbilical cord?
21.Does the blood of the mother and baby ever mix?
22.How old is the fetus when it gains the ability to hear sound?
23.What is the main job of the fetus during the last trimester?
24. By what percent does the mother’s blood supply increase during
pregnancy?
25.How many inches must the cervix open for the baby’s head? 4 inches
26.What two things do humans have that make delivery harder than for other
primates? A large brain and a narrow pelvis
Punnett square activity
What Is a Punnett Square?
A Punnett square is a method used to predict the outcomes of certain crosses between organisms.
As seen below, a Punnett square puts the genotypes for mother and father on the top and side of the square and creates
barriers between each parent’s allele. The picture below is an example of a square for eye color.
Image source: By Purpy Pupple CC BY-SA 3.0, via WIkimedia Commons
This diagram allows us to see the possible outcomes of a cross and the predicted percentage of phenotypes. In each
individual square, an allele from the side and the top is put together to form a possible genotype that combines both the
mother and father’s DNA.
When talking about Punnett squares, it is important to know what the terms heterozygous and homozygous mean.
Heterozygous refers to a genotype with two different alleles (i.e. Bb, Rr, etc.) and homozygous refers to a genotype
with two of the same alleles (i.e. BB, bb, etc.). We can make an even further distinction by saying something is
homozygous dominant (BB) or homozygous recessive (bb).
Try an experiment with two pennies. Cover both sides of the pennies with tape. On each penny, write
a capital B on one side and a small b on the other side. It will look like this.
Then, flip each penny. If you get two capital B’s, the child will have brown eyes. If you get two
lower case b’s, the child will have blue eyes. If you get one capital B and one lower case b, the child
will have brown eyes.
Try this four times and fill in what combination you get into each square below. Write at the bottom
of the square what color the eyes would be for that combination. I have filled in the first one as a
sample.
Bb
Brown eyes
______
_____
____
_____
Newborn baby –
Chapter 3
Reflexes
Reflexes
rooting
Eye blink
swimming
sucking
stepping
Palmar grasp
babinski
moro
tonic neck
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