Bio2

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1.
1 point
Nondisjunction of chromosomes resulting in aneuploidy occurs during
2.
1 point
The process of independent assortment of homologous chromosomes occurs at
3.
1 point
Which of the following crosses represents a dihybrid cross?
4.
1 point
Prokaryotic cells divide by
5.
1 point
all of the following are correct about mutations except
6.
1 point
Which choice describes how the DNA molecule replicates?
7.
1 point
Mendel tested for heterozygotes by using
8.
1 point
What causes cancer in cells?
9.
1 point
Gregor mendels work was different from that of other researchers working on inheritance in his day because he alone
10.
1 point
In which cell type would a cell plate form after telophase is complete
11.
1 point
During which stage of meiosis does crossing over occur?
12.
1 point
Where are genes located in the cell
13.
1 point
The proper sequence, beginning to end, for the stages of mitosis is?
14.
1 point
If several traits are affected by the same allele, the allele is said to be
15.
1 point
The ability to taste PTC is a dominant trait. If a heterozygote woman has a child with a man who is not a taster, what is the chance their child will be a taster?
16.
1 point
Genes for sex-linked traits tend to be carried on what chromosome?
17.
1 point
The building blocks of DNA are called
18.
1 point
In eukaryotes, the RNA copy of DNA that leaves the nucleus and travels to the cytoplasm to make protein is
19.
1 point
The mRNA has a three-nuclotide sequence called a(n) ______ while the molecule transporting the amino acid has a complementary sequence called a(n)
20.
1 point
In the human ABO blood grouping, there are four basic blood types, type A, type B, type AB, and type O. The blood proteins A and B are
21.
1 point
All of the following can cause mutation except
22.
1 point
Which of these is not a unique feature of meiosis?
23.
1 point
Which of the following analyses is not used in genetic screening of fetal cells?
24.
1 point
The purpose of meiosis I is
25.
1 point
How many possible gametes are there if a cell has 4 chromosome pairs?
26.
1 point
Which cell cycle phase is not correctly matched to its description?
27.
1 point
Biochemists Erwin Chargaff found that in DNA there was a special relationship between individual bases that we now refer to as Chargaffs rule. His obsevation was that
28.
1 point
During which stage of the cell cycle do daughter cells form
29.
1 point
In japanese four o'clock flowers, pink-flowered plants are produced when red-flowered plants are crossed with white-flowered plants. This type of inheritance can best be described as
30.
1 point
An organisms diploid number is 64. Its haploid number would be
31.
1 point
The G1, S, and G2 phases of the cell cycle are collectively known as
32.
1 point
All of the following are sources of genetic variation except
33.
1 point
The enzyme that joins the ends of newly synthesized segments of DNA after the primers have been removed is
34.
1 point
During which stage of mitosis do replicated chromosomes condense and the nuclear envelope disappear?
35.
1 point
Which is incorrect about the bases in nucleic acids?
36.
1 point
If an mRNA codon reads UAC, its complementary anticodon will be
37.
1 point
The bases of RNA are the same as those of DNA with the exception that RNA coontains
38.
1 point
Independent assortment of homologous chromosomes occurs at
39.
1 point
In anaphase I ____________ separate, and in anaphase II ______ separate.
40.
1 point
The diploid number chromosomes in humans is
41.
1 point
During metaphase
42.
1 point
White flower color is recessive to purple. What is the genotypic ratio when two heterozygous pea plants are crossed?
43.
1 point
After Meiosis I ________ cells are formed and after meiosis II, ______ cells reslult.
44.
1 point
Humans who have lost one copy of an autosome are called _________ and generally do not survive development
45.
1 point
Which of the following statements about how genotype determines pheotype is correct?
46.
1 point
the process of bringing the appropriate amino acid into position along the mRNA and building a polypeptide
47.
1 point
Two true-breeding pea plants are crossed, one with purple flowers and the other with white. Their offspring are?