This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: To express a polygenic trait: a. genes must interact with the environment. b. several genes must ... (Read 83 times)

cherise1989

  • Hero Member
  • *****
  • Posts: 555
on: Jun 25, 2018
To express a polygenic trait:
 
  a. genes must interact with the environment.
  b. several genes must act together.
  c. multiple mutations must occur in the same family.
  d. penetrance must occur.

Question 2

The gradual increase in height among the human population over the past 100 years is an example of:
 
  a. a polygenic trait.
  b. a multifactorial trait.
  c. crossing over.
  d. recombination.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jordangronback

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: B
Polygenic traits are those that result from several genes acting together. When environmental factors influence the expression of the trait, the term multifactorial inheritance is used. When multiple mutations occur in the same family, the mechanism most likely responsible is termed germline mosaicism. Penetrance of a trait is the percentage of individuals with a specific geno-type who also exhibit the expected phenotype.

Answer to Question 2

ANS: B
The gradual increase in height is an example of multifactorial traits influenced by genes and also by environment. Polygenic traits result from several genes acting together. Crossing over is an abnormal chromosome structure. Recombination results from new arrangements of alleles.


cherise1989

  • Member
  • Posts: 555
Reply 2 on: Jun 25, 2018
YES! Correct, THANKS for helping me on my review

ashely1112

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Everyone has one nostril that is larger than the other.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

The evolution of orthologs: homologous genes from different species. The evolution of orthologs: homologous genes from different species.
The rock cycle and the Earth’s physical environment The rock cycle and the Earth’s physical environment
Women can express breast milk using a breast pump Women can express breast milk using a breast pump
Classes and Frequency of Breast Cancer Susceptibility Genes Classes and Frequency of Breast Cancer Susceptibility Genes
Stabilizing selection eliminates extreme forms of a trait Stabilizing selection eliminates extreme forms of a trait
Enhancer trapping to reveal expression patterns of endogenous genes Enhancer trapping to reveal expression patterns of endogenous genes
Video: Passive Smoke Exposure

For a complete list of videos, visit our video library