Top
20
Doctor insights on: What Is A Dominant Trait

Share
1

1
Is congenital ptosis of the eyelid a dominate trait or is it a recessive trait?

Is congenital ptosis of the eyelid a dominate trait or is it a recessive trait?

Congenital ptosis: Although some cases of congenital ptosis (CP) have been mapped to certain abnormal genes and display autosomal dominant genetics (50% chance of passing to child), the vast majority of cases are sporadic. There are only 2 large studies on the incidence of cp, the risk of a child being born with CP is 1:552 - 1:842 live births. ...Read more

See 1 more doctor answer
2

2
What is a defective P53 gene. Is it inheritable?

What is a defective P53 gene. Is it inheritable?

Cell regulation: The P53 gene is thought to be involved in regulating cell death. When the P53 gene mutates or has a change from the normal gene, this may lead to types of cancers. ...Read more

3

3
What is the difference between a condition that is autosomal dominant or codominant?

What is the difference between a condition that is autosomal dominant or codominant?

Variety of alleles: Consider the example of blood groups. In the Rh system, D is the dominant allele, d the recessive. If a person has DD or Dd, they are Rh positive; if dd, they are negative. For the ABO group, A and B are codominant, and O is recessive. AB gives blood group AB. AA or AO gives A. BB or BO gives B. OO gives O. It's a little more tricky but I hope the basic idea is clear. ...Read more

4

4
Nearsightedness is a recessive trait. red-green color blindness is a sex-linked recessive trait, what does this mean?

Nearsightedness is a recessive trait. red-green color blindness is a sex-linked recessive trait, what does this mean?

An Autosomal: Recessive disorder: Both parents are unaffected carriers of a mutant gene. Each of their children has a 25% chance of inheriting the mutant gene from both & having the disorder. X-linked recessive: Mom carries a defective gene on one of her X chromosomes. Each son has a 50% chance of inheriting the X chromosome with the mutant gene & having the disorder; each daughter, 50% of being a carrier. ...Read more

5

5
Is there a particular chromosome XYY Syndrome is located? and is it recessive or dominant?

Is there a particular chromosome XYY Syndrome is located? and is it recessive or dominant?

No: XYY syndrome is neither autosomal dominant or recessive. See a geneticist about inheritance patterns. It is often causes by chromosome nondysjunction (lack of separation). There is not a particular chromosome but the sex chromosomes are called X and Y. Females typically are XX and Males XY. XYY is causes by a Y chromosome separation issue. XYY individuals are usually normal males ...Read more

6

6
What happens if a female is a carrier of allele for niemann-pick disease type a what is her genotype?

What happens if a female is a carrier of allele for niemann-pick disease type a what is her genotype?

Your genotype: depends on whether you are a carrier of Niemann-Pick Type A, B, C 1, C2, D, E or the rare F. Your OB-GYN will refer you for pre-pregnancy genetic counselling. Gather all medical history possible about your affected family members - onset & clinical presentation of symptoms, clinical course & lifespan. Your insurance will cover molecular genetic testing if you have a documented family history. ...Read more

7

7
What is the genetic disorder progeria caused by? Is it a simple recessive trait?

What is the genetic disorder progeria caused by?  Is it a simple recessive trait?

Two likely forms: Progeria syndrome is considered a sporadic (new mutation) phenomenon that has few prenatal indicators. At an average birth wt of 6lb (2.7kg), the relatively small size during gestation is not specific to this disorder. There are rare instances of siblings to normal parents, showing that an autosomal recessive form exists.Most begin to show signs by 6-18mo. ...Read more

8

8
Why is progeria a dominant gene?

Why is progeria a dominant gene?

Progeria: Progeria is an extremely rare genetic disorder that may be seen at an early age and is unlikely to develop at age 48. Please go online to Wikipedia and read through the information. What is your height and weight? Are you getting shorter? Are you getting a change in weight? Once you have read the article you should probably see your doctor. ...Read more

9

9
What happens if a condition is caused by a dominant mutation on an autosome:?

What happens if a condition is caused by a dominant mutation on an autosome:?

Many generations: The condition will be seen generation after generation in some individuals in the family, and will not skip generations although eventually with new family members introduced into the family children may be born without it due to the dominant allele potentially being replaced by a wild type normal allele that is not associated with the effects of the dominant mutation. Take care! ...Read more

10

10
What is the difference between an autosomal dominant and autosomal recessive trait?

What is the difference between an autosomal dominant and autosomal recessive trait?

Input required: In dominant disorders, the dominant member of the gene pair controls how the gene activities are expressed, so the other gene can carry the same or normal information.In recessive disorders, the normal gene compensates for the bad information in the other gene, allowing a person to function normally unless both genes carry the bad information. ...Read more

11

11
What is an allele?

What is an allele?

Genetics: An allele is a viable dna (deoxyribonucleic acid) coding that occupies a given position (locus) on a chromosome. Usually alleles are sequences that code for a gene. ...Read more

12

12
What exactly is the cause of lou gehrig's disease: a dominant allele or a recessive one?

What exactly is the cause of lou gehrig's disease: a dominant allele or a recessive one?

Neither: Familial ALS is relatively uncommon, especially in view of fact that this is a rather rare disease. Over 90% are sporadic, without clearcut genetic answers. ...Read more

See 1 more doctor answer
13

13
Please help? Is the disease gigantism a dominant or recessive gene?

Please help? Is the disease gigantism a dominant or recessive gene?

Neither: Pituitary gigantism results from a pituitary adenoma, an acquired tumor. There are a few dozen genetic syndromes in which a person may be extra-tall; common Marfan's is a dominant; there's a dominant family syndrome in which people are prone to get pituitary gigantism; there's at least one rare autosomal recessive with gigantism with multiple birth defects. ...Read more

16

16
Please help! what is the difference between a gene mutation and a chromosomal mutation?

Please help! what is the difference between a gene mutation and a chromosomal mutation?

Size: Chromosomes are the large packages containing the genes, usually changes in the genes are called mutations and changes in the chromosomes are copy number variations or changes involving gain or loss of chromosome material ...Read more

17

17
Is cystic fibrosis sex linked is it recessive or dominate is there a chromosome it is located on?

Is cystic fibrosis sex linked is it recessive or dominate is there a chromosome it is located on?

Recessive, Chms 7: About 70 % of CF cases are due to a kid inheriting a delta 508 mutation gene from both parents.There are other mutations that can pair up with a 508 and still cause CF, which helps explain some of the variations in the disease. It is not sex linked or dominant. Carrier detection is available. ...Read more

Dr. Alvin Lin Dr. Lin
2 doctors agreed:
18

18
What is recessive vs dominant heredity?

Dr. Alvin Lin Dr. Lin
2 doctors agreed:
What is recessive vs dominant heredity?

Mendellian genetics: In mendellian genetics, you inherit half your genes from your mom & half from your dad. Each of these genes can then be either recessive or dominant. Dominant genes only require one copy from either mom or dad to make trait apparent. Recessive genes require one copy from both mom & dad to make trait apparent. Carrier is person w/one copy of recessive gene (from either mom or dad). ...Read more

19

19
Is obesity a dominant or recessive trait?

Is obesity a dominant or recessive trait?

Explanation : Neither. Obesity do not have even cleat trait. Too many factors play roles: lifestyle and diet, physical activity are the most important. ...Read more