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Which statement best describes the process of crossing over?(1 point)

Responses

Homologous chromatids pair up, and non-sister chromosomes exchange genetic material.
Homologous chromatids pair up, and non-sister chromosomes exchange genetic material.

Pairs of homologous chromosomes are divided in half and distributed randomly into new haploid cells.
Pairs of homologous chromosomes are divided in half and distributed randomly into new haploid cells.

Pairs of homologous chromatids are divided in half and distributed randomly into new diploid cells.
Pairs of homologous chromatids are divided in half and distributed randomly into new diploid cells.

Homologous chromosomes pair up, and non-sister chromatids exchange genetic material.
Homologous chromosomes pair up, and non-sister chromatids exchange genetic material.

11 answers

Homologous chromosomes pair up, and non-sister chromatids exchange genetic material.
A student is completing a Punnett square for a trait (X/x) that is autosomal and inherited by the dominant allele. The father does not have it (xx), but the mother does (Xx). If they had two children, a son and a daughter, what would the completed Punnett square look like (i.e., would the son have the trait, would the daughter have the trait)?(1 point)
Responses

One child would inherit the trait and one child would not.
One child would inherit the trait and one child would not.

Each child has a 50% chance of inheriting the trait.
Each child has a 50% chance of inheriting the trait.

Both children would not inherit the trait.
Both children would not inherit the trait.

Both children would inherit the trait.
Each child has a 50% chance of inheriting the trait.
Which cell replicates via meiosis?(1 point)
Responses

heart cell
heart cell

skin cell
skin cell

red blood cell
red blood cell

sperm cell
sperm cell
Horses have three basic coat colors: red (or chestnut), bay, and black. All the colors are controlled by the interaction of two genes, Extension (E) and Agouti (A). The following combinations produce bay color: EE/Aa, Ee/Aa, EE/AA, Ee/AA. Only two produce black color: EE/aa, Ea/aa. Other combinations of the alleles of these genes plus mutations of others result in many possible coat colors and patterns in horses.

Coat color in horses is an example of which type of inheritance?

(1 point)
Responses

polygenic inheritance
polygenic inheritance

recessive inheritance
recessive inheritance

dominant inheritance
dominant inheritance

Mendelian inheritance
Coat color in horses is an example of polygenic inheritance.
This is the original strand of DNA: ATG AAG TTT GGC TAA

Which option would represent a frameshift mutation due to deletion during replication?

(1 point)
Responses

ATG AAG TTT GGC GCA TAA
ATG AAG TTT GGC GCA TAA

ATG TTT GGC TAA
ATG TTT GGC TAA

ATG AAG TTG GCT AA
ATG AAG TTG GCT AA

ATG UAA GTT TGG CTA A
ATG AAG TTG GCT AA would represent a frameshift mutation due to deletion during replication, as it shifts the reading frame by removing one nucleotide.
How are genotypes and phenotypes related?(1 point)
Responses

Both determine differences in genetic makeup.
Both determine differences in genetic makeup.

Both determine the alleles individuals receive.
Both determine the alleles individuals receive.

Phenotypes determine the genotypes expressed.
Phenotypes determine the genotypes expressed.

Genotypes determine the phenotypes expressed.
Genotypes determine the phenotypes expressed.
Genotypes determine the phenotypes expressed.