« previous next »

Author Question: Which is a birth defect or disorder that occurs as a new case in a family and is not inherited? ... (Read 18 times)

asmith134

  • Hero Member
  • *****
  • Posts: 576
on: Jun 28, 2018
Which is a birth defect or disorder that occurs as a new case in a family and is not inherited?
 
  a. Sporadic
  b. Polygenic
  c. Monosomy
  d. Association

Question 2

Which genetic term refers to the transfer of all or part of a chromosome to a different chromosome after chromosome breakage?
 
  a. Trisomy
  b. Monosomy
  c. Translocation
  d. Nondisjunction


wshriver

  • Sr. Member
  • ****
  • Posts: 318
Reply #1 on: Jun 28, 2018
Answer to Question 1

ANS: A
Sporadic describes a birth defect previously unidentified in a family. It is not inherited. Polygenic inheritance involves the inheritance of many genes at separate loci whose combined effects produce a given phenotype. Monosomy is an abnormal number of chromosomes whereby the chromosome is represented by a single copy in a somatic cell. A nonrandom cluster of malformations without a specific cause is an association.

Answer to Question 2

ANS: C
Translocation is the transfer of all or part of a chromosome to a different chromosome after chromosome breakage. It can be balanced, producing no phenotypic effects, or unbalanced, producing severe or lethal effects. Trisomy is an abnormal number of chromosomes caused by the presence of an extra chromosome, which is added to a given chromosome pair and results in a total of 47 chromosomes per cell. Monosomy is an abnormal number of chromosomes whereby the chromosome is represented by a single copy in a somatic cell. Nondisjunction is the failure of homologous chromosomes or chromatids to separate during mitosis or meiosis.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Genetic Defect Genetic Defect
Family Family
Some clues about the importance of language experience come from the tragic case of Genie, a girl ... Some clues about the importance of language experience come from the tragic case of Genie, a girl ...
Common skin signs are often evidence of an illness or disorder. A pustule is a small, elevated, ... Common skin signs are often evidence of an illness or disorder. A pustule is a small, elevated, ...
Common skin signs are often evidence of an illness or disorder. An erosion or ulcer is an eating or ... Common skin signs are often evidence of an illness or disorder. An erosion or ulcer is an eating or ...
Atrial septal defect Atrial septal defect
Video: Dendrite Animation

For a complete list of videos, visit our video library