Is it a myth, or truth that if siblings have children together, the child will be deformed?

Question

This is a HYPOTHETICAL question btw! lol! just out of curiosity I was wonderig if this was true and why, because I heard people saying this before.

Answer 1

it is just a myth but there are real side effects too

Answer 2

yes its true tere somthing like a 90% chance itll be difformed or have an illness of some type. just dont do it its totally sick man.

Answer 3

in-breeding always creates problems, although most of the time not in the 1st generation. but when it goes on and on, the risc increases, just look at royalty in russia, germany and england. there are lots of genetical transmitted diseases.

however, even in the 1st generation, there is a chance of mishap. we carry lots of so called recessive gens, who are defect or carry illnesses, these are silenced by the dominat gene, that is combinant with them and do no or little harm.

inbreeding can even cause damage in the 1st generation, as both siblings may carry the same recessive gen- and in the event of both loci comimg together, there will be no healthy genetical information to compensate it- then the according illness will immediately become apparent with a strong expression as well. even dominant genes will have a lesser impact, when combined with a healthy, unaffected genetical information, but there are exceptions from that rule, certain d/o cannot be compensated for, like huntington's disease,

bleeding d/o (commen in royalty, particularly in russia, but also england, princess anne had 17 stillberths because of a blood clotting d/o, as far as I remember, could have been rectified by 100mg aspirin per day, but instead the docs of the time led blood out of her and gave her enemas, thus concentrating her blood further- that is the way to kill both baby and mother, which I think eventially happened!) please don't count me on details of Hx, but I think, there is a BBC series on DVD available, if you are interested in more detail.

so, if you are interested in raising a family, look out for a healthy partner and check his Hx as best you can, also for mental illness, as this will not show in a lab-test! look also at the partners parents and assess the situation carefully. many things show in the parents, that may not be obvious at the time in their offspring, but will become apparent later!

good luck anyway.

Answer 4

It's all a lie! I am a Malfoy and bloody well proud of it!

I have 12 fingers and 12 toes just like everyone else!

~Slytherin Pride~

Answer 5

ive never even heard of that

Answer 6

it's not definitely true, but their child will have a much higher chance of being unhealthy in certain ways such as deformities, mental problems, etc.

It has something to do with the genes and something about when the 23 chromosomes from each side are too similar, then it causes certain mutations

Answer 7

There is an increased risk of abnormalities. The risk increases with each generation that continues to inbreed.

http://www.calvinayrelife.com/wp-content...

Answer 8

Basically, incest is "inbreeding"

Inbreeding is breeding between close relatives, whether plant or animal. If practiced repeatedly, it leads to an increase in homozygosity of a population. A higher frequency of recessive, deleterious traits in homozygous form in a population can, over time, result in inbreeding depression. This may occur when inbred individuals exhibit reduced health and fitness and lower levels of fertility.

It is natural that we should feel repulsed. Sexual reproduction — the current reproductive norm among plants and animals — gives creatures a leg-up in life. s*x results in diverse offspring and maintains a diversity of genes.

It's like nature's way of avoiding putting all its eggs in one basket: Where one copy of a gene may spell doom for one organism, a different version spread through s*x in another creature may help it survive.

People who domesticated plants and animals were likely the first to figure this out. When they inbred, they got lower birth weights, increased embryo death and decreased fertility.

Answer 9

Not at all. Most states in the USA do not allow first cousins or siblings to marry.  You probably also know that most laws in the USA are based on the Christian bible.  The bible is were the belief came from.

Answer 10

Of course they wont be deformed. The only reason to oppose the mating between siblings is to expand the gene pool. If siblings mate then the chances of genetically inherited problems are almost guaranteed into the next generation and cannot be bred out. That is all. No other reason against it is worthy

Answer 11

It's highly probably that there will be deformities.  When two people that closely related create a baby, the genes get really messed up.  I happens almost every time it's tried.

Answer 12

There is usually a genetic deformaty

Answer 13

It's not a myth

because there is no genetic diversity the chances of showing a hereditary abnormality is multiplied

Answer 14

While not true it isn't a myth.

Reproducing with a close family relative (closer than a second cousin) won't cause you to have a deformed child, but it will increase the chances of something being wrong with it and deformities are just one of the problems.

When you breed most animals on earth you combine two pairs of DNA strands to form a slightly new variant.  However, if you combine to strands that are too similar then you will reinforce any recessive traits which would lead to problems.

The classic example is the royal families of Europe who all breed with their own family.  A trait for hemophilia (bleeding without clotting) developed in the royal line and by continuing to breed with each other they reinforced the weakness and the problem became greater.

Currently the English Royal family is required to marry a commoner; someone who is not in the royal family so that the hemophilia trait will remain suppressed.  This is why when Prince Charles married Lady Diane, she was a lady (daughter of a lord), but of common not royal birth.

To this day the phrase "bloody" is a swear word in England because of the old hemophilia trait.

Dog breeders often have to face this problem since they tend to breed their dogs within their own family and the recessive genes that crop up get reinforced so the average boxer needs an operation to have its ears fixed or they will flop over.  Some breeds are more subject to certain diseases and genetic problems like hip problems.

Now if you have had a deformed child born to someone in your family then the chances of it happening again would increase dramatically if you breed with another family member.  But, it would not be automatic.

Answer 15

Tricky question this, Well, Both Gordon Brown and George Bush were the results of incestuous relationships so I will let you form your own opinions.

Answer 16

As the first man said, it does increase the rate of abnormally.

Just get married and adopt, there are more kid's who need to be adopted then to be poped out. Of course this is all hypothetically speaking.

Answer 17

Inbreeding is breeding between close relatives, whether plant or animal. If practiced repeatedly, it leads to an increase in homozygosity of a population. A higher frequency of recessive, deleterious traits in homozygous form in a population can, over time, result in inbreeding depression. This may occur when inbred individuals exhibit reduced health and fitness and lower levels of fertility.

Inbreeding may result in a far higher phenotypic expression of deleterious recessive genes within a population than would normally be expected.[1] As a result, first-generation inbred individuals are more likely to show physical and health defects, including:

reduced fertility both in litter size and sperm viability

increased genetic disorders

fluctuating facial asymmetry

lower birth rate

higher infant mortality

slower growth rate

smaller adult size

loss of immune system function.

hope i answered your question.

Answer 18

Its more of a possibility because when two people from the same gene pool "get together" the recessive genes that they could have that carry genetic defects become more dominant and have a better chance of affecting the child.

I also remember hearing that inbred kids have skinnier faces....lol not sure if that is true though.

Answer 19

From my understanding, it's not a definite but the chances of the baby having an abnormality increases. It's natures way of telling us it's WRONG !

Answer 20

Not neccessarily, siblings have had children together with no problems. However the chances of them being born with severe disformities or medical problems increases, particularly with recessive genes, where human nature relies on a diverse range of DNA to make up a human, and when two of the same kind of damaged gene meet, that's when things start to go wrong

Answer 21

Not necessarily, there are couples, siblings  who have had children illegally i might add and nothing has been wrong physically but morally that's a completely different story

Answer 22

sometimes there are physical deformities, but usually they have other health problems.  immune systems are not all that great, plus a number of other things that basically reduce quality of life.  a child born from incest is not a healthy one usually, however there have been cases in which the child turns out completely normal.

i remember reading about a man who fathered 6 kids with his daughter - 3 kids were suffering from (i think) muscular atrophy (or similar) while 3 were perfectly healthy.

Answer 23

Its not 100% true. This is because, siblings have recessive genes from the parents and when they decide to have a baby. the chances of the recessive genes taking dominance is higher, thus, abnormalities.

Answer 24

It isn't true.

The problem is that any recessive defective genes will be in both siblings, and thus there is a very elevated chance that the child will inherit the defect, even though it didn't affect the parents

Answer 25

Its no Myth just visit certain areas where is occurs and you will see the consequences.

Answer 26

inbreeding makes mutations more likely. that could be a deformity, downsyndrome, retardation, disability, other very serious problems.

Bottom line, dont sleep with any blood relative the consequences wouldnt be good.

Answer 27

It is a matter of probabilities.

The closer people are related, the more recessive genes they probably share in common.

This increases the probability of deformities or other genetic problems.  This is why the European monarchs of two centuries ago ended up with many hemophylia cases.  They married their cousins.

So, the answer is, that breeding with close relatives increases the chances of deformity and other problems, and the closer the relative (i.e. sibling) the more danger.

Answer 28

The shallower the gene pool, the greater the probability of problems.

People with a more varied gene pool, that contains lots of different traits from different parts of the world, tend to be healthier.