Homework Questions Flashcards
If a dogs muscle cells have 78 chromosomes, how many chromosomes in its sperm cells?
39
Separation of the sister chromatids is a characteristic of which stage of mitosis?
Anaphase
A cell in S phase is _____.
Preparing to divide
Crossing over occurs between _____.
Homologous chromosomes
Identical copies of a chromosomes held together by cohesion at the centromere are called ______.
Sister chromatids
Which of the following cells can undergo mitosis?
Lung cells in a dog
The bacteria that causes strep throat
Red blood cells in a human
Sperm cells in a whale
Lung cells in a dog
Which of the following events do NOT occur during interphase?
Disappearance of the nucleus
The mitosis spindles arise from which cell structure?
Centrosomes
Which is NOT true for meiosis?
It adds to the diversity within a species
It forms 4 unique haploid cells
It contains 2 rounds of cell division
It creates gametes
It forms 4 identical diploid cells
It happens only in the reproductive organs
It forms 4 identical diploid cells
Your father contributed ______ to you.
A haploid set of chromosomes
What happens immediately after the chromosomes are lined up single file?
Sister chromatids separate to opposite poles
Cyclins _____.
Both answers are true
Acts as checkpoints for the progression through the cell cycle
Neither answer is true
Prevent uncontrolled cell division
Both answers are true
Attachment of the mitotic spindle fibers to the kinetochores is a characteristic of which stage of mitosis?
Prometaphase
The fusing of Golgi vesicles at the metaphase plate of dividing plant cells forms what structure?
Cell plate
The part of meiosis that is similar to mitosis is _____.
Meiosis II
Klinefelter syndrome is a genetic condition in which a male is born with an extra copy of the X chromosome. This results from _____.
Nondisjunction during Anaphase I or Anaphase II
Which Omaha we is not equivalent to the others?
4 homologous chromatids
2 alleles
A bivalent
2 duplicated homologous chromosomes
A tetrad
2 alleles
Imagine you are performing a cross involving seed color in garden pea plants. What F1 offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green
100 percent yellow seeds
In humans, the gene for insulin is located on the short arm of Chromosome 11. Which of the following is NOT true for insulin?
Insulin is only produced in pancreatic cells
The insulin gene is only found in pancreatic cells
The insulin gene is autosomal
The insulin gene is found in every cell of your body
The insulin gene is only found in pancreatic cells
A recessive trait will be observed in individuals that are _____ for that trait.
Homozygous
If the allele encoding polydactyly (six fingers) is dominant, why do people have five fingers?
The polydactyly allele is very rare in the human population
Elephants have 56 chromosomes in their skin cells. What is n for elephants?
28
The observable traits expressed by an organism are described as its _____.
Phenotype
Which describes the genetic content of huge two daughter cells in prophase II of meiosis?
Haploid with two alleles of each gene
