50pts
the allele for attached earlobe is recessive. in the third generation, what are the odds that a carrier father and homozygous dominant mother will have ta child with an attached earlobe?

the trna bases called the are complimentary to three consectutive nucleotides on an mrna molecule

to produce transgeneic bacteria to make isulin, which of the steps listed bellow would a scientist do first?
a. insert the human insulin gene into a plasmid.
b. extract the insulin from the bacterial culture.
c. cut out the insulin gene from human dna.
d. transform bacteria with the recombinant plasmid.

the insulin produced by transgenic bacteria is identical to the insulin produced by humans because both are coded for by the same gene dna sequence.
true or false?
which of the following is a concern about the use of genetically modified plants in growing food?

a) genetically modified plants may require more pesticides.
b) genetically modified plants may not break down normally and cause recycling problems.
c) genetically modified plants may be more susceptible to disease.
d) genetically modified plants may harm organisms that were never intended to be harmed.

which of the following is a pair of transgenic organisms?

a) an amoeba and a hybridized peach tree

b) a bt corn plant and a polyploid banana tree

c) a hybridized peach tree and a polyploid banana tree

d) bacteria that make human insulin and a bt corn plant

which of the following statements describes the central dogma of molecular biology?
a. biological information in a cell passes from dnato rna to protiens
b. biological information in a cell passes from rna to protiens to dna
c. biological information in a cell passes from rna to dna to protiens
d. biological information in a cell passes from protien to rna to dna

how many chromosomes are shown in a normal human karyotype?
a.2
b.23
c.44
d.46
which of the following has the disadvantage of possibly bringing two ressesive alleles together and causeing a genetic defect?
a. inbreeding
b. hybridization
c. genetic engineering
d. transformation

operons allow prokaryotes
a. replicate dna at the appropriate time.
b. avoid mutations.
c. keep their dna organized.
d. conserve energy.

3. during which process do alleles undergo segregation? (1 point)dna replication. mitosis. meiosis. transcription.
4. gametes have (1 point)homologous chromosomes.. twice the number of chromosomes found in body cells.. two sets of chromosomes. . one allele for each gene. .

a male and female bison that are both heterozygous for normal skin pigmentation (aa) produce an albino
offspring (aa). which of mendel’s principles explain(s) why the offspring is albino?
a. dominance only
c. dominance and segregation
b. independent assortment only
d. segregation only