Question

In the cells of multicellular organisms, proteins are assembled in the(1 point)

mRNA.
mRNA.

ribosome.
ribosome.

nucleus.
nucleus.

chromatin.
GPT-4o mini
In the cells of multicellular organisms, proteins are assembled in the **ribosome**.
Which type of regulation in prokaryotes targets the mature mRNA before it can be used in protein synthesis?(1 point)
Responses

post-transcriptional control
post-transcriptional control

post-translational control
post-translational control

transcriptional control
transcriptional control

translational control
GPT-4o mini
The type of regulation in prokaryotes that targets the mature mRNA before it can be used in protein synthesis is called **post-transcriptional control**.
Transcription of a gene can be blocked when which factor attaches to the operator?(1 point)
Responses

repressor
repressor

RNA polymerase
RNA polymerase

exon
exon

promoter
GPT-4o mini
Transcription of a gene can be blocked when a **repressor** attaches to the operator.
A short pea plant is crossed with a tall, heterozygous pea plant. Use a Punnett square to determine the probability of short offspring.(1 point)
Responses

0%
0%

25%
25%

50%
50%

75%
GPT-4o mini
To determine the probability of short offspring when crossing a short pea plant (genotype **tt**) with a tall, heterozygous pea plant (genotype **Tt**), we can use a Punnett square.

The possible gametes from each parent are:
- Short plant (tt): produces gametes **t** and **t**
- Tall heterozygous plant (Tt): produces gametes **T** and **t**

Now, we can set up the Punnett square:

| | T | t |
|-------|-----|-----|
| **t** | Tt | tt |
| **t** | Tt | tt |

From the Punnett square, we see the possible genotypes for the offspring:
- **Tt** (tall) : 2 squares
- **tt** (short) : 2 squares

Thus, the ratios of the offspring are:
- Tall (Tt): 2 out of 4 (50%)
- Short (tt): 2 out of 4 (50%)

Therefore, the probability of producing short offspring is **50%**.
Traits can be affected by one gene and can be influenced by the environment.

Human blood types are controlled by two non-Mendelian patterns of inheritance. These two patterns are

(1 point)
Responses

multiple alleles and epistasis
multiple alleles and epistasis

codominance and polygenic inheritance
codominance and polygenic inheritance

epistasis and polygenic inheritance
epistasis and polygenic inheritance

codominance and multiple alleles
GPT-4o mini
Human blood types are controlled by two non-Mendelian patterns of inheritance: **codominance and multiple alleles**.
Human blood has four phenotypes: A, B, AB, and O. The genes for A and B are dominant, while O is recessive. If a person has AB blood type, what inheritance pattern is demonstrated?(1 point)
Responses

codominance
codominance

incomplete dominance
incomplete dominance

epistasis
epistasis

polygenic traits
GPT-4o mini
If a person has AB blood type, the inheritance pattern demonstrated is **codominance**.