Over a period of several years, a large hospital kept track of the number of births of babies displaying the trait achondroplasia. Achondroplasia is a very rare autosomal dominant condition resulting in dwarfism with abnormal body proportions. After 120,000 births, it was noted that there had been 27 babies born with achondroplasia. One physician was interested in determining how many of these dwarf babies result from new mutations and whether the apparent mutation rate in his area was higher than normal. He looked up the families of the 27 dwarf births and discovered that 4 of the dwarf babies had a dwarf parent. What is the apparent mutation rate of the achondroplasia gene in this population? Is it unusually high or low?

Answers

Answer 1
Answer:

Answer:

In the population of the study, mutation in the achondroplasia gene is unusually high

Explanation:

In this population, the incidence of genetic mutation that leads to achondroplasia would be 6 children for every 30,000 births. In the general population, achodroplasia has an incidence of 1 per 30,000 births, which indicates that in this specific population, the mutation rate is high above average, which can be explained by a high prevalence of the gene in the population.

Achondroplasia is a genetic disease with inheritance of an autosomal dominant pattern and to suffer from the disease, only one copy of the defective gene is necessary.However, in recent years after several studies it has been possible to demonstrate that even achondroplasia could be generated even in new mutations in the germ cells of the parents.


Related Questions

In humans there is a dominant allele (A) for the absence of moles; while the recessive allele (a) results in the presence of moles. A couple who are both heterozygous for this locus (Aa) plan to have seven children. a. Expand the binomial (p + q)7. b. What is the probability that: (i) The first child that is born will not have moles.(ii) All of the children will have moles. (iii) The first two children will have no moles and the last five will have moles. (iv) Of the 7 children, 4 will have no moles and 3 will have molesc. Assume this couple now have two children, one with moles and one without moles. What is the probability that the child born without moles is a carrier of the a-allele (ie heterozygous)?
Trình bày con đường chuyển sang nội kí sinh của giun tròn ?
Actin, myosin, and troponin are:A) ligaments B) tendons C) muscle protein D) bones E) types of ligaments The connective tissue holding bone to bone is a; A) tendon B) muscle C) smooth muscle D) ligament E) A and D
What does physical Science Focus on?
How did Griffith help build our understanding of genetic

What is the difference between a animal cell and a plant cell.

Answers

Answer:

Plant cells are eukaryotic cells present in green plants, photosynthetic eukaryotes of the kingdom Plantae. Their distinctive features include primary cell walls containing cellulose, hemicelluloses and pectin, the presence of plastids with the capability to perform photosynthesis and store starch, a large vacuole that regulates turgor pressure, the absence of flagella or centrioles, except in the gametes, and a unique method of cell division involving the formation of a cell plate or phragmoplast that separates the new daughter cells.

Explanation:

Plz give me a Brainiest.

Answer:

Animal cells do not have a cell wall or chloroplasts but plant cells do. Animal cells are mostly round and irregular in shape while plant cells have fixed, rectangular shapes.

PLS HELP GIVING BRAINLIEST !!!!!!

Answers

Answer:

Lever and wedge

Explanation:

You use a lever to add strength and the tip of the shovel is a wedge.

How many trophic levels are there in the following food chain?Grass - Grasshopper - Frog - Snake

Answers

There are four trophic levels in the given foodchain, i.e., producer, primary consumer, secondary consumer, and tertiary consumer.

What is a food chain?

A foodchain is a network of connections in a foodweb that begins with producer organisms and ends with a predator, detritivore, or decomposer species.

In the given foodchain, grass is produces, grasshopper is primary consumer, frog is secondary consumer, while snake is tertiary consumer.

Thus, there are four trophiclevels in the given foodchain.

For more details regarding food chain, visit:

brainly.com/question/7564953

#SPJ2

Answer: Four

Fun Fact - Locusts are actually species of short-horned grasshoppers, they often gather in large swarms and can destroy entire fields of crops, because a single grasshopper can eat half its body weight in plants per day.

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:

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.

Some information about bacteria and viruses is arranged in this table.Which argument about bacteria and viruses is supported by this information?


A.Bacteria are larger than viruses but are still small enough to enter cells.


B.Both bacteria and viruses are surrounded by protective coverings, through the composition of each covering may be different.


C. Only bacteria can acquire new characteristics, which makes them more difficult to treat.


D.Bacterial infections such as diphtheria and tetanus cannot be prevented by vaccines.

Answers

Answer: B

Explanation: Bacteria are larger than viruses but are still small enough to enter cells.

Final answer:

The argument supported by the information in the table is that both bacteria and viruses are surrounded by protective coverings, but the composition of each covering may be different.

Explanation:

The argument supported by the information in the table is option B. Both bacteria and viruses are surrounded by protective coverings, but the composition of each covering may be different. For example, bacteria have a rigid cell wall made of peptidoglycan, while viruses have a protein coat called a capsid.

This difference in composition affects how bacteria and viruses interact with their environments and how they can be treated.

Learn more about bacteria and viruses here:

brainly.com/question/36124252

#SPJ3

What will be the consequence if humans continue to over-hunt elephants for their ivory

Answers

Answer:

Extinction

Explanation:

Answer:

extinction if they are hunted so much