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Terms in this set (57)
• During which phase of meiosis does chromatin condense into chromosomes?
• If a trihybrid cross is made between parents that are heterozygous for all three traits (AaBbCc X AaBbCc) what proportion of the offspring would be expected to show the A phenotype?
• During which phase of meiosis do homologous chromosomes separate from each other?
• Which of the following are true about Down's Syndrome?
Results from non-disjunction of chromosome 21 in meiosis I
Results from non disjunction of chromosome 21 in meiosis II
Risk increases with the age of the mother
• Suppose that a truebreeding pea plant with wrinkled seeds is crossed with a truebreeding pea plant with round seeds and the offspring (F1 generation) produced are all round seeds. What is the expected phenotypic ratio in the F2 generation.
3:1 in favor of round seeds
• Suppose that a truebreeding pea plant with yellow seeds is crossed with a truebreeding pea plant with green seeds and the offspring produced all contain yellow seeds. Which of the following is true
Yellow is dominant to green
• During which phase of meiosis do sister chromatids separate from each other at the centromere?
• During prophase I of Meiosis, which process results in the generation of genetic variation?
Chiasma (crossing over)
• If Y represents the allele for yellow seed color and y represents the allele for green seed color, which of the following genotypes would possess a yellow seed color phenotype?
YY and Yy
• Suppose a pea plant with purple flowers was crossed with a pea plant with white flowers resulting in offspring some of which had purple flowers and some of which had white flowers in a 1:1 ratio. If purple is dominant to white, what was the genotype of the purple flowered parent?
• Suppose that a truebreeding pea plant with purple flowers and round seeds is crossed with a truebreeding pea plant with white flowers and wrinkled seeds to produce only offspring (F1 Generation) having purple flowers and round seeds. What proportion of the F2 generation would be expected to possess purple flowers and wrinkled seeds?
• DNA replication occurs during which phase of the cell cycle?
• In what structure / location does translation occur in a Eukaryotic cell?
• What parts of the cytoskeleton form the cleavage furrow during cytokinesis in animal cells?
Actin & myosin
• In which location / structure is the TATA box located?
• The observation that the amino acid Arginine is encoded by 6 codons illustrates that the genetic code is____.
• During anaphase, sister chromatids are pulled towards the centrosomes by______.
Translation occurs through the action of which of the following.
• A point mutation resulting in the deletion of a single nucleotide in an intron of a protein coding gene will most likely___
o have no effect on the amino acid sequence of the resulting protein.
o introduce stop codons in the resulting RNA molecule.
o prevent transcription.
o prevent translation
o result in a nonsense amino acid sequence downstream of the mutation.
• Using the rules of protein translation and the amino acid table from the text, determine the number of amino acids that would be contained in the peptide resulting from translation of the following RNA molecule.
o No translation would take place
• In mitotic cell division, chromosomes line up in the middle of the cell during____?
• Mitosis can produce_______.
Haploid cells from haploid cells.
Diploid cells from diploid cells.
• In DNA synthesis the lagging strand is synthesized ____.
Entirely out of RNA
In one continuous strand
Through formation of
• If the DNA sequence 3'-ACCAAACCGAGT-5' represents the template strand of a DNA molecule coding for protein, which of the following represents the product of transcription.
• The two strands of the DNA double helix are held together by which of the following?
• Which of the following separates the DNA double Helix into two strands during DNA replication?
• Identify the enzyme that joins the backbone of the DNA fragments synthesized from the lagging strand during DNA replication.
• In an RNA strand, U (Uracil) replaces what Nitrogenous base found in DNA?
• Transcription is the process by which ____.
RNA molecules are produced from a DNA template
• During DNA replication DNA polymerase moves in a ____ direction along the template strand and adds nucleotides to the ____ end of the growing strand.
3' to 5', 3'
• What is the role of topoisomerase during DNA replication?
Relieves stress as the double helix is unwound.
• Identify the DNA molecule that would be synthesized by DNA polymerase III using the following strand as a template (5'-AATCGATCG-3').
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.
that the parents were both heterozygous.
A cross between homozygous purple-flowered and homozygous white-flowered pea plants results in
offspring with purple flowers. This demonstrates
A) the blending model of genetics.
D) a dihybrid cross.
E) the mistakes made by Mendel.
What is the difference between a monohybrid cross and a dihybrid cross?
A) A monohybrid cross involves a single parent, whereas a dihybrid cross involves two parents.
B) A monohybrid cross produces a single progeny, whereas a dihybrid cross produces two progeny.
C) A dihybrid cross involves organisms that are heterozygous for two characters and a monohybrid only
D) A monohybrid cross is performed for one generation, whereas a dihybrid cross is performed for two
E) A monohybrid cross results in a 9:3:3:1 ratio whereas a dihybrid cross gives a 3:1 ratio.
A dihybrid cross involves organisms that are heterozygous for two characters and a monohybrid only
Pea plants were particularly well suited for use in Mendelʹs breeding experiments for all of the following
reasons except that
A) peas show easily observed variations in a number of characters, such as pea shape and flower color.
B) it is possible to control matings between different pea plants.
C) it is possible to obtain large numbers of progeny from any given cross.
D) peas have an unusually long generation time.
E) many of the observable characters that vary in pea plants are controlled by single genes.
peas have an unusually long generation time.
Red blood cells have 6 different genotypes. These genotypes result in how many different phenotypes?
Which term refers to the genetic control of continuously varying traits such as height?
Phenotypes are generally a product of:
the genotype in combination with the environment.
Red blood cells have how many different possible genotypes?
Most genes come in alternative forms called:
During which phase of Mitosis does the nuclear envelope fragment?
Which of the following are characteristics of cancer cells?
They promote angiogenesis
-They undergo rapid cell divisons
Identify the process that reduces chromosome number from 2N to 1N
In what structure/location does translation occur in an Eukaryotic cell?
A point mutation resulting in the deletion of a single nucleotide in an intron of a protein coding gene will most likely____
Have no effect on the amino acid sequence of the resulting protein.
The reaction center p680 can be found in..
Using the rules of protein translation and the amino acid table from the text, determine the number of amino acids that would be contained in the peptide resulting from translation of the following RNA molecule...
The electron transport chain pumps protons into what structure/region?
Which of the following is NOT found in the chlorophyll molecule?
In DNA synthesis the lagging strand is synthesized...
through the formation of Okazaki fragments
In which of the following photosynthetic systems does the Calvin cycle operate during illumination (Day)?
ALL OF THE ABOVE!!!
When grown under elevated atmospheric CO2, photosynthetic rates of C3 plates are predicted to____and photosynethetic rates of C4 plates are predicted to_____?
Increase, show little change..
Identify the biomolecules that make up the backbone of the DNA double helix
What is the role of topoisomerase during DNA replication?
Relieves stress as the double helix is unwound
What do the spindle fibers do?
split sister chromatids
What has a 'proofreading' function?
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