In snapdragons, red multiply white rightarrow pink. This pattern of inheritance is explained by
Which of the following is TRUE about gene expression?
Different tissues within an organism express different genes.
During anaphase of meiosis I, what segregates?
During which stage of mitosis do sister chromatids move away from each other?
The failure of chromosomes to segregate properly during meiosis is called
Nuclear membrane reappears
Colorblindness is more common in men than in women because
Men only have one x chromosome
Which does NOT happen during meiosis?
production of diploid cells
Chromosomes move to the equator
Asexual reproduction produces genetically identical individuals because
no meiosis or fertilization takes place
The sequence of nitrogen-containing bases on one strand of DNA most directly determines the sequence of
amino acids in a protein molecule
The number of nucleotides in a codon is
Although the law of independent assortment is generally applicable, when two loci are on the same chromosome the phenotypes of the progeny(offspring) sometimes do not fit the phenotypes predicted. This is due to
Codominance occurs when
both of the alleles in a heterozygote are expressed phenotypically in an individual.
How can a gene be mutated with no resulting change in the protein that is produced from that gene?
A codon has changed, but it codes for he same amino acid as the original codon.
The state of having more than two sets of chromosomes is called
The longest period of a cell's life cycle is
What kind of mutation occurs when one base is changed to another at a single location in the DNA?
In plant cells, cytokinesis is accomplished by the formation of
a cell plate
If the sequence of bases in a section of DNA is TAGGCTAA, what is the corresponding sequence of bases in mRNA?
How can a single gene code for more than one protein?
The exons within a mRNA can be spliced together in different ways.
If, in a heterozygous individual, only one allele is expressed in the phenotype, that allele is
An individual having 2 identical alleles at a particular locus
The site of protein synthesis is the
A mutation that results in a change in the codon reading pattern could result from
either an insertion or a deletion of a base.
Reciprocal exchange of genetic material between similar chromosomes is called
The physical manifestation of an organism's genes is its
The process of converting the "message" of mRNA into a sequence of amino acids is called
The microtubules of the mitotic spindle attach to a specialized structure in the centromere region of each chromosome, called the
If we cross two pea plants each heterozygous for yellow seed color genes, the expected ratio of yellow : green among the offspring will be
75% yellow, 25 % green
The two cells at the end of meiosis I
Transcription is the process of
synthesizing an RNA molecule using a DNA template.
When a fragment breaks from a chromosome and rejoins it, in a flipped orientation, the result is called a(n)
The main function of meiosis II is
separate sister chromatids during anaphase
During the "S" portion of interphase, what is the cell doing?
The molecules that make up a chromosome are
proteins and DNA
For a mutation to affect evolution, it must occur in
Gene expression is
the flow of genetic information from genes to proteins.
When the expression of a trait is influenced by the action of many genes, the pattern of inheritance is called