Question

Transcription of a gene can be blocked when which factor attaches to the operator?(1 point)
Responses

exon
exon

RNA polymerase
RNA polymerase

promoter
promoter

repressor
Answer
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

75%
75%

50%
50%

25%
25%

0%
Answer
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

epistasis and polygenic inheritance
epistasis and polygenic inheritance

codominance and multiple alleles
codominance and multiple alleles

codominance and polygenic inheritance
Answer
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

epistasis
epistasis

polygenic traits
polygenic traits

codominance
codominance

incomplete dominance
Answer
A tall pea plant is crossed with a short pea plant. Half the offspring are tall and half are short. How would you designate the allele for tallness?(1 point)
Responses

TT
TT

T
T

Tt
Tt

tt
Answer
Which statement best differentiates between the Rust Belt region and the rest of the United States?(1 point)
Responses

The Rust Belt is a functional region characterized by similar historic economic activity, specifically, manufacturing.
The Rust Belt is a functional region characterized by similar historic economic activity, specifically, manufacturing.

The Rust Belt is a functional region characterized by similar historic economic activity, specifically, agriculture.
The Rust Belt is a functional region characterized by similar historic economic activity, specifically, agriculture.

The Rust Belt is a perceptual region that is commonly referred to as such because of its past prominence as an ecoregion.
The Rust Belt is a perceptual region that is commonly referred to as such because of its past prominence as an ecoregion.

The Rust Belt is a formal region surrounded by functional regions.
The Rust Belt is a formal region surrounded by functional regions.
Answered by GPT-4o mini
Transcription of a gene can be blocked when a **repressor** attaches to the operator.
Answered by GPT-4o mini
To determine the probability of short offspring from a cross between a short pea plant (homozygous recessive, "tt") and a tall heterozygous pea plant ("Tt"), we can set up a Punnett square.

Here are the genotypes involved:
- Short plant: tt (homozygous recessive)
- Tall plant: Tt (heterozygous)

The possible gametes from each parent are as follows:
- For the short plant (tt): t, t
- For the tall plant (Tt): T, t

Now, we create the Punnett square:

```
T t
---------------
t | Tt | tt |
---------------
t | Tt | tt |
---------------
```

From the Punnett square, we see the following genotypes of the offspring:
- 2 offspring are Tt (tall)
- 2 offspring are tt (short)

This results in a total of 4 offspring, with 2 of them being short (tt).

To find the probability of short offspring:
- Number of short offspring (tt) = 2
- Total offspring = 4

Probability of short offspring = Number of short offspring / Total offspring = 2/4 = 1/2 = 50%

Thus, the probability of short offspring is **50%**.
Answered by GPT-4o mini
Human blood types are controlled by two non-Mendelian patterns of inheritance: **codominance and multiple alleles**.
Answered by GPT-4o mini
If a person has AB blood type, the inheritance pattern demonstrated is **codominance**.
Answered by GPT-4o mini
In this scenario, if half the offspring are tall and half are short, it indicates that the tall pea plant is heterozygous. Therefore, the allele for tallness would be designated as **T** (the dominant allele) in combination with a recessive allele (t). The correct designation for the genotype of the tall plant would be **Tt**, but considering you're asking for just the allele for tallness, the answer is **T**.
Answered by GPT-4o mini
The statement that best differentiates between the Rust Belt region and the rest of the United States is:

**The Rust Belt is a functional region characterized by similar historic economic activity, specifically, manufacturing.**