14. What does Mendel's law of segregation say? When in meiosis does this
segregation occur?
15. How can two organisms have the same genotype but different phenotypes? For
instance, why aren't identical twins (who have the same DNA) exactly the same in
every way?
16. What does the law of independent assortment say? When in meiosis does
independent assortment occur? In what cases does this law not hold true?
17. Can you draw Punnett Squares for crosses of up to 2 genes at once? If I tell you
that alleles are completely dominant, incompletely dominant, epistatic, or
codominant, can you tell me which genotype codes for which traits? Can you draw
Punnett squares for sex-linked traits?
18. Be familiar with how the ABO blood types work. What kind of dominance do the
alleles for blood types show?
10. When Mendel crossed a purple-flowered pea with a white-flowered pea in the P
generation, all the offspring were purple, but the white flower trait reappeared in the
F2 generation. How can a trait disappear in one generation and reappear in the
next?
11. If you see a 3:1 ratio in the offspring from a genetic cross, what does this tell you
about the genotypes of the parents?
12. If tall height (T) is dominant to short height (t) and purple flowers (P) are dominant
to white flowers (p), what fraction of the offspring from the cross TtPp x ttPP will be
short and purple?
13. Let's you crossed a true breeding plant that produces lethal poison with a true
breeding plant that produces no poison for the P generation. All of the F1
generation produce mild poison. 1/4 of the F2 generation produce lethal poison, 1/4
produce no poison, and 1/2 produce mild poison. What kind of dominance is this an
example of?
6. In what kind of situation would you want to perform a test cross? How would you do
it?
7. Suppose that a certain breed of dogs has either floppy or pointy ears, and this trait
is controlled by one gene with two alleles. Pointy ears are dominant over floppy
ears. You have a pointy-eared dog and want to know whether it is homozygous or
heterozygous. What would you do?
8. If you cross a true-breeding homozygous dominant individual with a true-breeding
homozygous recessive individual, what will be the genotypes and phenotypes of the
F1 generation? If you cross the F1 generation with each other, what will be the
genotypes and phenotypes of the F2 generation?
9. In humans, having free earlobes (F) is completely dominant over having attached
earlobes (f). If a man with free earlobes marries a woman with attached earlobes,
and all of their kids have free earlobes, what is most likely the genotype of the
father? Can you be completely sure of the father's genotype? Why or why not?
1. What type of dominance(complete, incomplete, or codominance) best fits the
Blending hypothesis? What type fits the particulate hypothesis?
2. What is a character (a gene)? What is a trait (an allele)? If I say that information at
one locus on a chromosome codes for either blue or orange flowers, can you tell
me what is the gene and what is the allele?
3. What is a genotype? What is a phenotype? If I ask you to write the genotype and
phenotype for a heterozygous flower from one of Mendel's pea plants, can you do
it?
4. What do we mean by P, F1, and F2 generations?
5. What do we mean by "true-breeding" or "pure?" What do we mean by "hybrid?"
What is a monohybrid cross? What is a dihybrid cross?
1. Formulate a feed at 30% crude protein meant for Nile Tilapia in a grow -out pond from the following ingredients:
One (1) part Fish meal (FM) at 60% crude protein
Three (3) parts Soya been meal (SBM) at 40% crude protein
Four (4) parts Wheat bran (WB) at 16% crude protein
One (1) corn meal (CM) at 14 % crude protein
Vitamin and Mineral source 2%
1. Oftentimes, scientists face unexpected challenges as they work on resolving a certain problem. As you were working on resolving this environmental issue, you received a report from a group of environmental engineers who are working with you on this project showing that the bacteria you are intending to use is not found in high quantities in that area of the sea.
Find a solution to this shortage by researching. In your answer be sure to discuss the role of the enzyme hydroxylase.
Why uracil concentration increases in ornithine transcorbamylase deficiency?
During anaphase the centromere of the chromosome split
Describe the features of bacterial (prokaryotic) cells
palisade cells near the top of the leaf contain many chloroplasts. Which of the following best explains why?