BIOLOGY COLLEGE

You observe a population of Island Sparrows for which the phenotype of crown color varies from yellow to white. You perform two experiments. Experiment 1 shows that this variation in the phenotype affects mating success, so that birds with yellow crown colors have more offspring. Experiment 2 shows that this variation in phenotype is determined fully by the diet of the birds and not genetics. Crown color will evolve via natural selection in this population of Island Sparrows.1. True
2. False

Answers

Answer 1
Answer:

Answer:

yes true Crown colour evolves by natural sselection.

Explanation:

  • From Experiment 2, it is clear that the color of the crown does not depend on the genes. It depends only on the food taken by the sparrow. Experiment 1 proves that yellow people have higher reproductive success. Those with yellow crowns have good skills in finding food. Depends on hunting / feeding vision, hunting skills, body muscles, etc. These genes are determined in whole or in part.
  • The Yellow Crown Sparrow contains the gene for their offspring. These offspring get genes that are very good at finding food so that they can get the food they need. They need a yellow crown. Ends
  • White-crowned sparrows are not good at finding food. They produce a small number of offspring that are not enough to find food. Lack of proper food, resulting in a white crown, results in a small number of offspring.
  • Over time the sparrow crown develops in the yellow direction. This is due to differences in hunting / feeding skills. This difference leads to natural saliva.

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The pedigree below tracks a genetic abnormality through five generations of a family tree. The trait, polydactyly, is characterized by extra fingers (left), toes, or both. The pedigree shows the number of fingers on each hand in black; toes on each foot, in red. male female unknown gender marriage/mating individual with the trait being studied I, II, III, IV... generation offspring Standard symbols used in pedigrees. 1 II *Gene not expressed in this carrier. III IV V (a) Using the pedigree, describe the genotypes of the parents for the trait polydactyly in generation I. (b) (6) Explain how humans are able to produce gametes that are haploid. (c) According to the pedigree, explain the inheritance pattern of the genetic abnormality polydactyly.
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The order of amino acids in a protein does not matter

Answers

Answer:Amino acids, often referred to as the building blocks of proteins, are compounds that play many critical roles in your body. They're needed for vital processes like the building of proteins and synthesis of hormones and neurotransmitters.

Explanation:

Describe the invasion of wild parsnip, including the harm it causes

Answers

Answer:

poisonus

Explanation:

Answer:

came from Europe and Asia

invaded the entire state of Wisconsin

can burn your skin

reproduces rapidly

can be removed at root or with a powered brush cutter for large populations

Explanation:

Sorry that it is late, but this is the Edge version.

A 26-year-old woman is in the clinic today for evaluation of weight gain and fatigue. She is 5 feet 6 inches and weighs 175 pounds. Prior to her pregnancy, she weighed 130 pounds and her maximum weight during pregnancy was 155 pounds. She is now 18 months postpartum and continuing to gain weight despite no change in diet or activity. She reports that the fatigue is getting worse even though her daughter is sleeping reliably through the night and the patient feels she is getting plenty of rest. She takes no other medications and has no significant medical history. Her vital signs today are HR 68, BP 108/60, RR 10, temperature 97° F. The nurse practitioner orders a CBC, TSH, and T4.1. What sources of fatigue is the nurse practitioner evaluating with the CBC, T4, and TSH?2. What other history or clinical findings would be indicative of hypothyroidism?3. The patient’s laboratory values show an elevated TSH and a low T4. What does this mean?4. After starting the patient on thyroid hormone replacement, the nurse practitioner asks the patient to return in 8 weeks to check her TSH level. What is the purpose of this test? What should be done if the test result is abnormal?

Answers

Answer:

Studies based on tsh concentrations would indicate whether the thyroid hormones, which are t4 and t3, are in decline or in deficit.

This deficit may be due to a pathology of the thyroid gland and that is why the tsh study is carried out. The TSH hormone is one that stimulates the thyroid gland through the glandular-nervous axis (CNS), if it is in deficit, you want to say that it is being poorly stimulated.

Other findings of hypothyroidism are overweight, decreased basal metabolism, alterations in the cardiovascular system, and increased blood pressure.

That the TSH hormone is elevated, and there is a deficiency of t4, means that the hormone is suffering from some neoplasm, or some pathology that does not collaborate with the function of the gland, that is, that the axis between the central nervous system and The thyroid gland works perfectly, but what is defective is the gland, the body itself captures this deficit of t4 and stimulates the neuronal pathway even more, releasing more TSH, to overstimulate the thyroid gland and that it can generate the amount of t4 required.

The nurse seeks to know that if by administering t4 and balancing the values of this thyroid hormone, TSH normalizes and returns to its normal value, that is, it decreases and does not overstimulate the thyroid gland.

In the event that TSH does not decrease as expected, there will be a double problem to be solved, one at the nervous level and the other at the glandular level.

On the other hand, if the TSH level normalizes, we could understand that the TSH was increased because it wanted to "solve" the t4 deficit.

Explanation:

The thyroid gland works thanks to the stimulation exerted by the central nervous system through TSH.

The TSH hormone is the one that is responsible for stimulating the exact and fair secretion of t4 and t3, sometimes it tends to increase, due to negative feedback, since the increase in t4 and t3 causes the tsh to decrease and the right balance is reached . In case the hormones secreted by the thyroid are in deficit, this will be captured by the body and will not have this negative feedback, therefore the stimulation of the nervous axis will be increased.

The thyroid gland can suffer from metabolism syndromes where hypoactivity or hypothyroidism is detected, or hyperactivity which is also known as hyperthyroidism, although these syndromes are not the only ones, there are also other pathologies such as malignant and benign neoplasms, hashimoto's disease, among others.

Where is water most likely to be found in the presence of the phospholipid bilayer shown below?A. in between the layers because the tails attract water
B. above and below the structure because the heads attract water
C. nowhere because the entire structure repels water

Answers

Actually it’s B. The hydrophilic heads attract water, which would mean water can be found above or below the structure

Water most likely to be found in the presence of the phospholipid bilayer above and below the structure because the heads attract water. Option B

In mice, the autosomal locus coding for the β-globin chain of hemoglobin is 1 m.u. from the albino locus. Assume for the moment that the same is true in humans. The disease sickle-cell anemia is the result of homozygosity for a particular mutation in the β-globin gene.a. A son is born to an albino man and a woman with sickle-cell anemia. What kinds of gametes will the son form, and in what proportions? (2 points)b. A daughter is born to a normal man and a woman who has both albinism and sickle-cell anemia. What kinds of gametes will the daughter form, and in what proportions? (2 points)c. If the son in part a grows up and marries the daughter in part b, what is the probability that a child of theirs will be an albino with sickle-cell anemia? (1 point)

Answers

Answer:

Explanation:

The disease sickle cell anemia is caused by homozygosity for a mutation:

  • SS or Ss genotypes: normal
  • ss: anemia

Albinism is a recessive trait:

  • AA or Aa: normal
  • aa: albinism

The genes S/s and A/a are linked and separated by 1  map unit.

Remember that 1 mu means that 1% of the gametes produced by an individual will be recombinant.

a) Albino man (Sa/Sa) X woman with sickle-cell anemia (sA/sA)

Son: Sa/sA

The gametes he can produce are:

  • Parentals: Sa and sA
  • Recombinant: SA and sa

Since the frequency of recombination is 1% (or 0.01), each recombinant gamete has a frequency of 0.005 (since there are two possible recombinant gametes).

The parental gametes will appear with a frequency of 0.99, each of them with a frequenct of 0.495.

b) Normal man (SA/SA) X woman with anemia and albinism (sa/sa)

Daughter: SA/sa

The gametes she can produce are:

  • Parentals: SA (0.495) and sa (0.495)
  • Recombinant: Sa (0.005) and sA (0.005)

c) Son (Sa/sA) X daughter (SA/sa)

In order for them to have an albino child with anemia (sa/sa), the gamete sa from each parent had to be produced and fused into the zygote. Since the production of gametes by each parent is an independent event, the probability of having sa/sa offspring can be calculated as:

Prob. sa gamete son × Prob. sa gamete daughter = 0.005 × 0.495 = 0.0025

The probability that a child of theirs will be an albino with sickle-cell anemia is 0.25%

Answer to get brainliest tell me your spective about climate change

Answers

Answer:

It a bad thing that is happing now and people need a way to stop it or the world will die

Explanation:
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