Which of the following is true of a parasitic relationship?(1 point)
Responses
The parasite benefits, and the host is harmed; however, the host is not generally killed.
The parasite benefits, and the host is harmed; however, the host is not generally killed.
The parasite benefits, and the host is killed.
The parasite benefits, and the host is killed.
The parasite benefits for a time; however, both the parasite and the host eventually die as a result of the relationship.
The parasite benefits for a time; however, both the parasite and the host eventually die as a result of the relationship.
[Choice D]The host benefits from the relationship, and the parasite is harmed.
The correct option is:
A. The parasite benefits, and the host is harmed; however, the host is not generally killed.
Both of Tim's parents have brown eyes, but Tim has blue eyes. How is this possible?(1 point)
Responses
The characteristic (blue eyes) is carried in a recessive gene.
The characteristic (blue eyes) is carried in a recessive gene.
This characteristic (blue eyes) must be carried in the dominant gene.
This characteristic (blue eyes) must be carried in the dominant gene.
Eye color is not a genetic trait.
Eye color is not a genetic trait.
all of these
The correct response is:
A. The characteristic (blue eyes) is carried in a recessive gene.
A widow's peak is a V-shaped area of the hairline in the center of the forehead. The allele for having a widow's peak is dominant to the allele for not having a widow's peak.If two parents do not have widow's peaks, what is the probability that their child will have a widow's peak?(1 point)Responses75%75%50%50%25%25%0
If both parents do not have widow's peaks, it means that they are both homozygous recessive (ww) for this trait. Since the allele for having a widow's peak is dominant (W), the only way for the child to have a widow's peak is if they inherit at least one dominant allele.
When both parents are homozygous recessive (ww), all of their offspring will inherit the recessive allele. Therefore, the probability that their child will have a widow's peak is 0% (as they don't carry the dominant allele for this trait).
Therefore, the correct response is:
E. 0%
An organism that contains two different alleles for a trait is said to be _______ for that trait.(1 point)
Responses
Recessive
Recessive
Heterozygous
Heterozygous
Dominant
Dominant
Homozygous
The correct response is:
B. Heterozygous
Which of the following is true about genes?(1 point)
Responses
Genes are responsible for all the traits of an organism.
Genes are responsible for all the traits of an organism.
In humans, genes are passed to an offspring from two parents.
In humans, genes are passed to an offspring from two parents.
Genes are made up of smaller molecules known as chromosomes.
Genes are made up of smaller molecules known as chromosomes.
The genes of a particular organism can never change throughout its lifetime.
The genes of a particular organism can never change throughout its lifetime.
The correct response is:
A. Genes are responsible for all the traits of an organism.
Which of the following is a method of reproduction that generally occurs very rapidly?(1 point)
Responses
hybridizing
hybridizing
sexual
sexual
asexual
asexual
germination