Mendelian Genetics
An organism with two of the same alleles for a particular trait
Homozygous
..................... It represents relative positions of the genes
Chromosome maps
Not all traits are determined by two alleles. Some forms of inheritance are determined by more than two alleles
Multiple Allele
....................... enzyme adds appropriate nucleotides to the new DNA strand using the parental DNA as template
DNA polymerase
.................... Substances that cause mutations
mutagens
Zz are pink, what ratio of pink to non-pink phenotype will you get by allowing two pink plants to cross-fertilize?
3:1
Which of those organisms is most likely to exhibit polyploidy?
A ) Fish
B ) lion
C ) Wheat
D ) human
C ) wheat
Coat color in Labrador retrievers is an example of
Epistasis
.................... proteins keeps the strands separate during replication
Single-strand proteins
................... control The process during which young, immature cells take on individual characteristics and reach their mature (specialized) form and function
Hox genes
in salamander, the allele for silly " S " is dominant for wise "s ", and the allele for naughty " N " is dominant for nice " n " , i a homozygous wise , nice mates with a homozygous silly , naughty , what is the propability that they will have wise , nice offspring ?
0 / 16
What is the disadvantage of inbreeding?
is that harmful recessive traits also can be passed on to future generations
In snapdragons, heterozygotes for one of the genes have pink flowers, whereas homozygotes have red or white flowers. When plants with red flowers are crossed with plants with white flowers, what proportion of the offspring will have pink flowers?
100%
Why does the DNA double helix have a uniform diameter?
A) Purines pair with pyrimidines.
B) C nucleotides pair with A nucleotides.
C) Deoxyribose sugars bind with ribose sugars.
D) Nucleotides bind with nucleosides.
E) Nucleotides bind with nucleoside triphosphates
A) Purines pair with pyrimidines.
What kind of mutations cause increasing the length of chromosomes?
insertion, duplication and expanding
Two plants are crossed, resulting in offspring with a 3:1 ratio for a particular trait. This suggests
A: that the parents were true-breeding for contrasting traits
B) incomplete dominance
C) that a blending of traits has occurred.
D) that the parents were both heterozygous.
E) that each offspring has the same alleles.
D
If the number of the genetic recombination in an organism was 4096, then the number of chromosomes pairs will be
12
A woman who has blood type A has a daughter who is type O and a son who is type B. what is the possible phenotype for the father?
B
Accuracy in the translation of mRNA into the primary structure of a polypeptide depends on specificity in the ?
A) binding of ribosomes to mRNA.
B) shape of the A and P sites of ribosomes.
C) bonding of the anticodon to the codon.
D) attachment of amino acids to tRNAs.
E) both C and D
E) both C and D
Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome. If she moves the repressor gene, along with its promoter, to a position at some several thousand base pairs away from its normal position, which will you expect to occur?
The lac operon will be expressed continuously
In a cross AaBbCc × AaBbCc, what is the probability of producing the genotype AABBCC?
1 / 64
.................... is based on a modification of defective genotypes by adding functional genes made through recombinant DNA technology
Applied genetics
Which terms best describe when the phenotype of the heterozygote differs from the phenotypes of both homozygotes?
Incomplete dominance
a sequence of parent DNA has four purine bases and two pyrimidine bases, according to base pairing rules, which of the following sequence would be formed during replication?
A) 2 cytosine , 2 adenine , 2 thymine
B) 2 cytosine , 2 adenine , 2 uracil
C) 2 Adenine , 2 thymine , 1 guanine , 1 cytosine
D ) 2 adenine , 2 guanine , 2 cytosine
A) 2 cytosine , 2 adenine , 2 thymine
The functioning of enhancers is an example of
A) transcriptional control of gene expression.
B) a post-transcriptional mechanism for editing mRNA.
C) the stimulation of translation by initiation factors.
D) post-translational control that activates certain proteins.
E) a eukaryotic equivalent of prokaryotic promoter functioning.
A) transcriptional control of gene expression.