Meiosis
Meiosis makes sperm or egg cells with
a. Same amount of chromosomes as in the parent
b. Half the amount of chromosomes in the parent
c. Twice the amount of chromosomes as in the parent
B
No
Curly hair is recessive in dogs. If a curly haired dog (hh) and a straight haired dog (HH) have puppies, the gene version of the gene expressed (that you actually see) in the puppies) will be....
a. Curly hair
b. Straight hair
Chromosomes contain
a. One gene
b. Many genes
B. Many genes
True or false: Every sperm or egg cell produced via meiosis has the same chromosomes in it.
False
Which of these question(s) is/are not scientifically testable?
a. What does CCG code for?
b. How are DNA and proteins similar?
c. Should we edit the DNA of children before they're born?
C
If a striped cat and a spotted cat have kittens and all the kittens have stripes, then stripes are
A. Dominant
B. Recessive
A. Dominant
A chromosome is made of
a. One DNA molecule tightly wound up
b. Many DNA molecules tightly wound together
A. One DNA molecule
Chromosomes switch parts with one another, so children get new combinations of genes their parents may not have
Is " Should we clone dogs after they've passed away?" a scientifically testable question? Why or why not?
No, it's opinion based, different people would answer differently
A= Round wings
a- pointy wings
Two butterflies with round wings (genotype: Aa) have 100 babies. About how many babies will have pointy wings?
You have two copies of each chromosome, one from each parent. Do these chromosomes have the same versions of genes? For example, if your dad's chromosome has the green version of the eye color gene, will your mom's chromosome also have the green version of the eye color gene?
No, you might have a different version of each gene on the chromosome from your mom vs from your dad
Janelle has two copies of the version of the gene for being tall (TT). She has one copy of the gene for speed (B) and one copy of the gene for endurance (b). What are two different possible egg cells her body might make during meiosis?
TB and Tb
I draw a Punnett square and it says two white dogs have a 100% chance of having white puppies. How could I test my Punnett square to see if it's accurate?
Breed two white dogs and see if all their puppies are white, flip chips, have someone check my work, etc.
A tall cow and a short cow had babies (Cross #1). One of those tall cow babies grew up and had cow babies of her own (Cross #2). Based on this data, is tall the dominant or recessive version of the gene? Why?
Dominant, it was expressed even with one copy
What is a possible source of genetic variation? Something that can create a new version of a gene on your chromosome?
Random mistake when copying a chromosome (error during DNA replication), environmental factors such as UV radiation from the sun, chemicals, viruses, etc.
My dad has blue eyes and my mom has brown eyes. My sister has brown eyes but I have blue eyes. Is it true that I got all my chromosomes from my dad and my sister got all her chromosomes from my mom and that's why we have different colored eyes? If it's not true, what happened instead?
Not true. My sister and I both got half our chromosomes from our mom and half from our dad. During meiosis, however, it's random which half of your parents' chromosomes you get, so I may have gotten two copies of the gene version for blue eyes and my sister got one copy or two copies of the gene version for brown eyes
I'm going to flip a coin to test the probability of having a child with sickle cell anemia. For the most accurate results, I should flip the coin
a. 25 times
b. 50 times
c. 100 times
Why?
C, more times reduce the chance of one bad throw or streak throwing off my results
Why are some of the cow babies in Cross 2 short even though both their parents are tall?
Two copies of the recessive short version of the gene their parents carried
True or false: In any given organism, the genes found on one chromosome can also be found on other chromosomes. (See image)
False