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3 years ago

In a Punnett square, parent traits are written as a letter which represent what?

Biology

1 answer:

taurus [48]3 years ago

6 0

Answer:

The correct option is B. Alleles

Explanation:

The punnet square can be described as a diagram which shows the outcomes of a cross. A punnet square will help us know what will be the probability for a particular trait to occur in the offsprings.

Genes might have the same or different alleles. If the alleles for a gene are similar in an organism, the organism is said to be homozygous for the trait. If the alleles are different, then the organism is termed as heterozygous.

A dominant allele is the one which which suppresses the effect of the recessive allele. A recessive allele gets masked by a dominant allele.

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An air pressure of 1,005 millibars is equivalent to approximately how many inches of Mercury?

N76 [4]

1005milibars of pressure corresponds to 29.68inches of mercury.

Option D.

<h3>Explanation:</h3>

Mercury has a density of around 13.6gm/cc. Thus the pressure of inches of mercury will have a huge effect on the value. As far as bar is concerned, it's around the normal atmospheric pressure measured at sea level. Its around 1,00,000 pascals. So from converting a pressure at millibars to inches of mercury, we need to divide the value by a factor of 33.864.

So, pressure in milibars =1005milibars.

So, pressure in inches of mercury = 1005/33.864 = 29.68 inches of mercury.

6 0

3 years ago

List 4 targets of antibiotics.

Aleksandr-060686 [28]

Answer: Antibiotics targets the synthesis of protein, nucleic acid, folate and cell wall.

1. Synthesis of protein; antibiotics binds to either 30s or 50s ribosomal subunits blocking the polypeptide from the exiting the tunnel thus inhibiting a full completion of protein expression or production.

2. Nucleic acid synthesis; Antibiotics also act by inhibiting genetic expression, DNA transcription and replication where DNA makes exact copies of itself, as well as RNA molecules preventing bacterial growth.

3. Cell wall synthesis; Inhibition of cell wall synthesis in microorganisms will prevent it from replication and growth.

4. Folate synthesis; Folic acid also known as vitamin B9 helps in DNA replication and cell division. Folate antagonists such as aminopterin kills bacteria by preventing folic acid production required for DNA replication.

3 0

3 years ago

When translating secretory or membrane proteins, ribosomes are directed to the ERmembrane byA) a specific characteristic of the

Yuliya22 [10]

Answer:

B) a signal-recognition particle that brings ribosomes to a receptor protein in the ER membrane.

Explanation:

Each synthesized protein has to be targeted to the specific location and transported to that location. There are two possible ways for that transport: post-translational transport or co-translational transport.

• Co-translational transport occurs during the process of translation, and proteins transported this way are proteins bound for organelles in the endomembrane system (such as the ER, Golgi apparatus, and lysosome), plasma membrane proteins or proteins for the exterior of the cell. They have an amino sequence called a signal peptide which sends them to ER first.

• Proteins that do not have a signal peptide stay in the cytosol so, their transport is after the translation (post-translational).

6 0

3 years ago

Complete the sentence using the word below

8090 [49]

Answer:

During a process called photosynthesis, plants take in carbon dioxide, sunlight ,and water.

Plants make sugar and give off oxygen as a by-product of this process.

Please mark me brainliest if this answer could help, have a great day.

5 0

2 years ago

14. Brainstorm and write at least 3 potential challenges or important points to consider when conducting the described

Afina-wow [57]

When conducting an experiment, there are different aspects to consider, such as the question that drives to the reseach, the hypothesis, theoretical framework, variables involved -independent, dependent, and controll-, methodology, study groups, data analisys, among others.

In the exposed example, Pincky is lacking theoretical framework, defining which are the study groups, methodology to collect data, and a description of data analysis.

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The scientific method is a research method that consists of systematic observations, measures, experimentation, analysis, and verification of a hypothesis. It is based on two aspects: reproducibility, which is the capability of reproducing the experiment in any other place by any researcher, and refutability, which is the susceptibility to be refused.

When conducting an experiment, you need to consider,

• Definition and problem statement. The question for which there is not an answer yet.

• Hypothesis formulation. A hypothesis is a scientific conjecture, not verified, that requires corroboration.

• Data collection and analysis. This step involves testing the observations.

• Results

• Verification of hypothesis. This step involves the deriving of the working hypothesis.

• Discussion and Conclusion.

Previous knowledge about the study object is always required for a better understandig. A question the investigator wants to answer. The main goal of the study, which is basically what the investigator wants to find out. The researcher makes a hypothesis to predict what is going to happen. The experiment is to be performed to answer the question. The conclusions through which the hypothesis might be rejected or accepted.

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So in this experiment there must be,

Theoretical framework, such as information about the species, life stage at which they begin chirping, about external factors that might affect it or benefit it, and etcetera.

The goal: To know how temperature affects cricket´s chirping

Hypothesis: Crickets chirp less frequently under cold temperature than under warm temperature.

Variables: Temperature → Independent

Chirp frequency → Dependent

Water and food supply, light exposure, refuge → Controlled

Study groups: group of crickets exposed to a warmer temperature

group of crickets exposed to a colder temperature

Methodology: Individuals analyzed should be in the same development stage, or at least be sexually mature. Two groups of 10 individuals each should be placed under the same conditions, excepting for temperature. One of the groups should be exposed to warmer temperatures and the other one to lower temperatures. Chirps should be recorded for a week.

Data analysis: Using the chirps records, the frequency can be measured for each group. Results should be compared using different statistical analyses.

Results: Results should be clearly exposed, using texts, charts, and graphs.

Discussion and Conclusion: Hypothesis acceptance or rejection. Discussion about the expected results against the observed ones.

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Related link: brainly.com/question/17645242

3 0

3 years ago