Module 6; Bio 110
Terms in this set (28)
If a diploid organism produces somatic cells containing 32 chromosomes, how many chromosomes would be contained in each of its gametes?
b. 16c. 32
e. not enough information given
Mendel's experiments involved
a. traits exhibiting complete dominance
b. cross pollination
c. all of the responses are correct
d. pea plants
How many chromosomes did you inherit from your biological father?
In humans, the Y chromosome
a. is homologous to the X chromosome
b. contains the SRY gene that initiates male gender determination
c. is present in all sperm
d. contains every gene needed for male development
Term used to describe the migration of cancer cells into blood and/or lymph
b. blastocyst implantation
d. tumor suppressor gene activation
Which of the following statements involving normal human sexual reproduction is true?
a. the head of the sperm contains 2n DNA
b. unequal cytokinesis occurs during spermatogenesis
c. a zygote undergoes meiotic divisions to form a blastocyst
d. ovulation is controlled by hormones
Which of the following cell types is incapable of mitosis?
a. embryonic stem cells
c. adult stem cells
Which statement best summarizes this paradox: multicellular organisms are comprised of uniquely functioning cells despite the fact that they contain the same genetic information.
a. the pattern of inheritance that dictates expression of a specific gene is not predictable
b. specific genes are turned on or off
c. random mutations occur during gastrulation
d. genotypes and therefore phenotypes vary in each one of your cells
Which part of the female reproductive anatomy is correctly matched with its function?
a. ovaries: a contraceptive device
b. oviduct: the birth canal
c. uterus: implantation of blastocyst and gestational development
d. vagina: egg and sperm meet here to form a zygote
If a sperm containing an X chromosome fertilizes an egg, the offspring will genotypically be
a. a boy
c. an identical twin
e. a fraternal twin
f. a girl
Cell "program" that initiates intentional cell destruction
Alternative forms of the same gene are called
From production through ejaculation, which is the correct pathway for sperm cells?
a. Seminiferous tubules → Epididymis → Vas Deferens → Urethra
b. Epididymis → Seminal Vesicles → Vas Deferens → Prostate Gland → Urethra
c. Testis → Prostate Gland → Ureter → Vas Deferens
d. Seminiferous tubules → Seminal Vesicles → Prostate gland → Vas Deferens
The process of meiosis
a. results in the formation of haploid offspring cells from a diploid parent cell
b. involves division of the zygote in the oviduct
c. enables root growth in plants
d. involves genetic shuffling during Meiosis II
What accounts for the existence of multiple alleles for a single trait within the human gene pool?
a. new alleles arise due to mutations
b. crossing over and independent assortment during meiosis
c. All of the responses are correct
d. selective pressure eliminates most allele variants
e. wild type alleles mutate faster than other alleles
The genetic information illustrated in this nucleus would best be described as
a. two gene loci, the lighter and darker colors indicating maternal and paternal contributions
b. four chromosomes, housing homozygous recessive genes
c. four homologous chromosomes, with four gene loci indicated
d. two pairs of homologous chromosomes, with two gene loci indicated
In multicellular eukaryotic organisms, dead or damaged cells are replaced by ________.
d. binary fission
Elephants are composed of cells containing 56 chromosomes. If a body cell of an elephant undergoes mitosis, each offspring cell will contain how many chromosomes?
An advantage of sexual reproduction over asexual reproduction is that sexual reproduction
a. is energetically less expensive
b. does not require a partner
c. results in the genetically identical cells
d. results in diversity within a species
Humans have about 21,000 genes. Which of the following genes is involved with cell cycle regulation?
a. insulin gene
c. hemoglobin gene
d. ATP synthase gene
Cystic fibrosis (CF) is an inherited autosomal recessive disorder. A male that is heterozygous for CF has a child with a female who is also a carrier. Which statement regarding the potential offspring is correct?
a. There is a 50% chance that their offspring will have CF.
b. There is a no chance that their offspring will have CF.
c. There is a 25% chance that their offspring will have CF.
d. There is a 75% chance that their offspring will have CF.
Which response best explains how identical twins form
a. the splitting of blastocyst cells as they move down the oviduct Correct
b. a single sperm fertilizing a single egg which then proceeds through normal mitotic divisions
c. two zygotes that merge
d. the fertilization of one egg by two sperm
y cells have 2n DNA, meaning
Taste receptors are proteins and therefore have a gene recipe. TAS2R38 is gene for a bitter taste receptor located on chromosome 7. PTC (Phenylthiocarbamide) is a harmless chemical produced due to this gene's expression. This gene is controlled by complete dominance; humans either taste or do not taste PTC. It has been determined that taste is associated with the dominant allele (T)
Based on this scenario, which of the following is true?
a. The genotypes assigned to tasters are TT or Tt.
b. The genotype assigned to tasters is TT.
c. The genotype assigned to tasters is tt.
d. The genotypes assigned to tasters are TT, Tt or tt.
A mutation in a tumor suppressor gene is most likely to result in
a. inability to produce ATP
b. uncontrolled cell division of the mutant cell
c. non-functioning transport proteins
d. a variety of X-linked disorders
Males tend to be affected in greater numbers by X-linked recessive genetic disorders than are females because
a. Y chromosomes are not as strong as the X chromosome
b. Males are the genetically weaker gender
c. females require two dominant alleles to have the disorder
d. males with only one recessive allele have the disorder
Assuming the cell cycle is proceeding as intended, it involves
a. normal growth of a cell in interphase
b. All of the responses are correct
c. DNA Replication in interphase
d. the formation of genetically identical offspring cells when cytokinesis is complete
e. none of the responses are correct
Human body cells have 2n DNA, meaning
a. None of the responses are correct.
b. All of the responses are correct.
c. Human genomes have two alleles for every gene
d. Humans are diploid organisms.
e. Each biological parent contributed half of this 2n DNA.
The reason siblings from the same biological parents have unique DNA is because
a. of independent assortment and crossing over in meiosis
b. eggs are larger than sperm due to unequal cytokinesis
c. of mutations generated during pregnancy
d. of non-disjunctions that occur during meiosis