NEW
Font size
WorksheetsMatrix , inheritance
Total questions: 25
Worksheet time: 13mins
Supportive tissues, such as bone or wood, derive their strength from:
cells.
extracellular matrix.
cytoskeletal filaments.
Which of the following tissues is characterized by a plentiful extracellular matrix?
Connective
Epithelial
Nervous
Muscular
In connective tissues, the tensile strength of the tissue is chiefly provided by:
proteoglycans.
collagen.
actin.
cellulose.
Fibroblasts play a role in:
collagen destruction
orienting cellulose.
orienting collagen.
. apoptosis.
Which protein in a fibroblast’s plasma membrane attaches to the extracellular matrix on the outside of the cell and (through adapter molecules) to actin inside the cell?
Proteoglycan
Cadherin
Fibronectin
Integrin
Which of the following is NOT true of gap junctions?
They allow inorganic ions and small water-soluble molecules to move directly between cells.
They allow ATP-driven pumps to move substances from one cell to another.
They allow an electrical and a metabolic coupling between the cells. They may be opened or closed as needed.
In the extracellular matrix of animal tissues, which of the following molecules allows the matrix to resist compression?
Integrin
Collagen
Fibronectin
Proteoglycans
Which of the following is NOT true of the basal lamina?
The basal lamina is a thin tough sheet of extracellular matrix.
The basal lamina lines the inside of epithelia cells at the basal membrane surface
The basal lamina contains a specialized type of collagen (type IV collagen).
Cadherin proteins:
create an electrical and metabolic coupling between epithelial cells.
link epithelial cells together by binding to similar cadherins in adjacent epithelial cells.
allow ions and small molecules to pass from one plant cell to another.
anchor epithelial cells to the basal lamina.
Which type of epithelial junction plays a role in an epithelial sheet’s ability to develop tension or change its shape by contraction?
Desmosome
Gap junction
Tight junction
Adherens junction
.A diploid organism that reproduces sexually produces ____ gametes.
haploid
diploid
triploid
Which of the following is the term for a cell produced by the fusion of two gametes?
Egg
Germ cell
Somatic cell
Zygote
Which of the following statements does NOT describe an advantage of sexual reproduction?
Reshuffling genes through sexual reproduction can help a species survive in an unpredictably variable environment.
Sexual reproduction can speed the elimination of deleterious alleles from a population (e.g., males who succeed in mating allow the best collections of genes to be passed on).
Through sexual reproduction, a set of parents can produce a large number of identical offspring.
Which of the following statements accurately describes the process of meiosis?
Meiosis begins with a single round of DNA replication, followed by a single round of cell division.
Meiosis begins with a single round of DNA replication, followed by two rounds of cell division.
Meiosis occurs by a single round of cell division, without a preceding round of DNA replication.
Early in meiosis I, homologous chromosomes join to form bivalents, which contain how many chromatids?
<1
2
3
4
When does recombination (crossing-over) occur?
Meiosis I
Meiosis II
Mitosis M Phase
All of the above
Which is NOT a function of crossing-over?
The proper segregation of maternal and paternal homologs
The creation of new combinations of maternal and paternal genes on individual chromosomes
The correct pairing of maternal and paternal chromosomes in the zygote
Which of the following terms is used for a cell or organism that contains the wrong number of chromosomes?
Haploid
Aneuploid
Polyploid
Diploid
Which of the following describes the appearance of an organism?
A. Phenotype
Phenotype
Genotype
An individual that possesses two identical alleles is said to be _____for that trait.
homozygous
heterozygous
homologous
monozygotic
Mendel crossed true-breeding plants producing yellow peas with true- breeding plants producing green peas and found that the hybrid offspring all had yellow peas. Which allele is recessive?
yellow color allele
Green color allele
.In a diploid organism loss of function mutations are usually recessive because:
they are so rare.
they are complemented by gain of function mutations.
the other, normal copy of the gene does the job.
In a cross of pea plants, yellow seed color is dominant over green, and round seed shape is dominant over wrinkled. Consider an experiment in which true breeding plants are mated (YYRR x yyrr), and the F1 progeny are then allowed to self-fertilize. Mendel’s law of independent assortment would suggest which of the following ratios for the phenotypes of the
F2 plants?
1 yellow-round: 2 yellow-wrinkled: 2 green-round: 1 green-wrinkled
1 yellow-round: 1 yellow-wrinkled: 1 green-round: 1 green-wrinkled
1 yellow-round: 2 yellow-wrinkled: 4 green-round: 1 green-wrinkled
9 yellow-round: 3 yellow-wrinkled: 3 green-round: 1 green-wrinkled
In humans, genes associated with red-green colorblindness and hemophilia are typically inherited together because:
the two genes are both recessive.
the two genes produce gene products that interact with each other.
the two genes lie close together on the same chromosome.
Harmful mutations that are recessive:
are immediately eliminated from the gene pool.
can be present in phenotypically normal individuals.
prevent an organism from reproducing.
never affect the phenotype of an organism.
