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Genetics is incredibly complicated microbiology, and this is an extremely oversimplified introduction to very basic genetic concepts. Please keep that in mind as you read through this page. Many people have dedicated their entire careers to the study of genetics, and much is being learned on a daily basis in the continuing field of genetic research.
Genes, the unit of heredity in cells, are inherited from one's parents. They are made up of pairs of alleles in the individual. One gene allele is inherited from the mother (via the egg), and the other one from the father (via the sperm).
Capital letters usually indicate a dominant gene allele, or one that is "stronger". Only one dominant allele of a gene pair needs to be present for that allele to be expressed (be evident). Dominant alleles mask, or hide, the recessive ("weaker") allele. The recessive allele must be inherited from both parents in order to be expressed. In other words they must be present as a pair to be shown. Recessives are indicated with a lower case letter.
Most visible traits are produced by many genes interacting in the individual. These are called polygenic traits. But some traits are controlled by a single gene. For our theoretical simplified example, we will use a single gene trait.
A = dominant allele a = recessive allele
If A indicates short hair in a dog, for this example, and a indicates longhair, then:
AA would be a shorthaired dog with no longhair recessive.
Aa would be a shorthaired dog with a longhaired recessive, but you would not know it was carrying the longhaired trait by looking at the dog, since the dominant allele, A, masked the recessive allele, a.
aa would be a longhaired dog , since the recessive alleles must be present in a pair to be expressed, however please see * Note below regarding the quantity of hair likely to be present in such a dog that had an Aa parent. As can clearly be seen, it is not possible for the aa dog to carry or pass on the dominant trait, which for this example, is shorthair..
Forget all that ! I have been breeding dogs for over 55 years and i can tell you that the long coated dog is a dominate. If you breed 100 years of short coats and you breed one long coat into your short coat, you will get short coats, but if you choose the long coat pup and breed back to your long coat you will get a majority of long coats. Then you breed all long coats for 100 years and bred to a short coat you will retrace your steps in reverse. Once you have long coats you will never ever get a short coat unless you 'outcross' to a short coated breed. example is the American Cocker spaniel which can never go back to its former look. The judges and breeders chose to go with the long coat and now, you will never be able to get what the standards call for. All American Cockers should be thrown out of the show rings for non conformation to the standards of their breed. your answer is YES
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∙ 10y ago
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What is the difference between a homozygous trait and a heterozygous trait and can you please provide an example for each?
a homozygous trait is when an offspring has either both dominant genes or both recessive genes from its parents. a heterozygous trait is when an offspring has both dominant and recessive genes. for example: a long-tailed cat is dominant and a short-tailed cat is recessive. the long-tailed cat (homozygous dominant) had offsprings with the short-tailed cat (homozygous recessive). by doing the punnett square, 100% of their offspring will be heterozygous.
Are tight eyelids a dominate or recessive trait?
It depends on the "lenght" of your eyelashes. If you have long eyelashes than it is dominant. If you have short eyelashes than it is recessive.
Is turner syndrome a dominant or recessive?
yes it is a recessive trait
What human trait is altered by variations in environment?
There is a long list, skin color, diabetes, hair color, toenail length, lifespan, weight, to name a few.
What are some example of trait?
features from a higher generationNo traits are the characteristics of a person for example if someone has big ears or a big nose or long hair those are traitsExampes of traits are hair, eyes, nose shape, ears, and hearing
Is long hair dogs more dominate then smooth hair?
Not necessarily, although it can be. The dominant trait depends upon the breed of the dog. Golden Retrievers are dominant to have long hair, while Labradors are dominant to have smooth hair.
Is the long hair cat in the p generation a hybrid or a purebred?
It's a purebred because it's offspring have the dominant trait in them.
If short hair L is dominant to long hair l animals LL and Ll have the same what?
If short hair, represented by L, is the dominant trait, then both animals with LL genes and Ll genes will have short hair because they have the short hair gene. The Ll animal, however, may have a long haired offspring if they mate with another animal carrying the long hair gene and they both pass it on.
A dominant phenotype will only be expressed if the individual is homozygous dominant for that trait?
Well actually not necessarily. An individual can be homozygous or heterozygous dominant for a trait. As long as they have that dominant allele in that specific genetic trait, they will automatically express the dominant phenotype. If a person is homozygous dominant, it just means that they will pass on both dominant traits to the offspring. If a person is heterozygous dominant , it means that they will pass on both a dominant and recessive trait to their offspring.Hope that helps ! =D
What is the difference between a homozygous trait and a heterozygous trait and can you please provide an example for each?
a homozygous trait is when an offspring has either both dominant genes or both recessive genes from its parents. a heterozygous trait is when an offspring has both dominant and recessive genes. for example: a long-tailed cat is dominant and a short-tailed cat is recessive. the long-tailed cat (homozygous dominant) had offsprings with the short-tailed cat (homozygous recessive). by doing the punnett square, 100% of their offspring will be heterozygous.
Is long hair a physical trait?
No, because you have the choise of making it short or long.
In dogs short hair is dominant over long hair. Two short haired dogs are the parents of a litter of eight puppies. Six puppies have short hair and two have long hair. What are the genotypes of parents?
Well, it really depends. You have to look at their pedigree and find out if anyone in their family has long hair. Such as the grandpa or grandma. 2 short hair dachsunds had 4 puppies. 3 were short haired and one was long. Their next litter was 2:2 and their last litter was 2:2 again. The dads parents both had long hair.
Is hair color a inherited trait?
Hair color is an inherited trait, although it is also a trait that can be altered, by artificial means, and hair color also varies with age. Eventually, if you live long enough your hair will turn white, regardless of what color you inherited.
If short hair (L) is dominant to long hair (I) ,animals with LL and Ll have the same?
LL and Ll will both express the dominant gene, in this case short hair. Only an animal with both recessive genes (ll) will have long hair.
Are tight eyelids a dominate or recessive trait?
It depends on the "lenght" of your eyelashes. If you have long eyelashes than it is dominant. If you have short eyelashes than it is recessive.
Is the long haired cat in the p generation a hybrid or purebred?
It's a purebred because it's offspring have the dominant trait in them.
Is hair color a inherited?
Hair color is an inherited trait, although it is also a trait that can be altered, by artificial means, and hair color also varies with age. Eventually, if you live long enough your hair will turn white, regardless of what color you inherited.
