A mutation in DNA subsequently causes a premature STOP codon in the mRNA strand. What happens when the ribosome reaches a STOP codon?
The ribosome puts a stop amino acid in protein
The ribosome detaches from the mRNA strand
The ribosome and mRNA are stuck together
The tRNA takes over for the ribosome
2.
A bird with blue eyes has the genotype bb. How would you describe the bird's genotype?
heterozygous
homozygous dominant
homozygous recessive
incomplete dominance
3.
How is an organism's genotype related to its phenotype?
variations in genotype lead to different phenotypes
they are not related
variations in phenotype lead to different genotype
4.
A genotype of Mm could be described as
heterozygous
homozygous
two of the same alleles
polygenetic
5.
To pass its traits on to the next generation, an organism must ______________.
have friends
have recessive alleles
reproduce
6.
Organisms that reproduce sexually tend to have this advantage over organisms that reproduce asexually
They have less genetic diversity because they only mate with one other parent
They can reproduce faster than asexual organisms
They have more genetic diversity because each offspring has genes from two parents
7.
A trait controlled by more than one gene is called
polygenic
codominant
inherited and acquired
heterozygous
8.
A white mouse is crossed with a black mouse. All the offspring were grey. The genes for fur color in mice show _________________.
Complete dominance
Incomplete dominance
Recessive inheritance
Codominance
9.
A purple flower, Rr, is crossed with another purple flower, Rr. What percentage of offspring will be purple if the R allele is completely dominant?
100%
25%
50%
75%
10.
Organisms that reproduce asexually
have 50% of the same genes from each parent
have 0% of the same genes as their one parent
have 75% of the same genes as their one parent
have 100% of the same genes as their one parent
11.
DNA is transcribed into _____ which is then translated by the ribosome and tRNA to make a ____.
amino acids; gene
mRNA; protein
DNA; mRNA
DNA helicase; mRNA
12.
Genes are specific sections of ______________________.
proteins
alleles
RNA
DNA
13.
A hydra reproduces by "budding off" an offspring from the parent hydra. This is an example of
natural selection
asexual reproduction
sexual reproduction
translation
14.
Chromosome pairs contain different versions of genes, which are called __________________.
homozygous
DNA
alleles
mRNA
We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.
What are your choices?