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Are recessive traits inherited?
A recessive trait can only be passed along if both parents carry at least one of the recessive genes to the child. If both parents manifest the trait (that is, if both parents have both recessive genes), then the child will manifest (that is, carry both recessive genes and display) the recessive trait. If one parent manifests and the other parent only carries the trait (that is, carries one dominant and one recessive gene) then the child will definitely carry and have a 50% chance of manifesting. If both parents carry the recessive, the child is 25% likely not to carry the trait at all, 50% likely to carry and 25% likely to manifest the trait.
Which chromosomes carries the fewest numbers of genes?
The y chromosome, which only contains a few hundred genes.
If an animal with 2 dominant genes for a trait has offspring with an animal with 2 recessive genes for same trait their offspring can only have what?
Their offspring will have dominant genes. However, if these offspring have offspring with an amimal with recessive genes, the recessive genes will show up.
What is sex-link?
A sex-linked trait is a trait governed by genes on only one of the two sex chromosomes.
When is the only time a recessive phenotype can be observed?
A recessive phenotype can only be observed when the individual carries both the recessive alleles for the specific trait.
Traits that typically will only be expressed in offspring if they inherit two copies of the genes for the trait are called?
Traits that typically will only be expressed in offspring if they inherit two copies of the genes for the trait are called Recessive traits. - Nikkkki
If a pattern of inheritance for a trait is complete dominance then an organism heterozygous for the trait would normally express?
If a trait is dominant, then an organisms heterozygous (hybrid) for that trait would normally show: A) The recessive trait only B) The dominant trait only C) A blend of the recessive and dominant traits D) A phenotype unlike that of either parent B) The dominant trait only! Reason being because heterozygous means the pair of genes are different. When this occurs, only the dominant trait is expressed.
Is heterozygeous dominant or reccesive?
Heterozygous means that it carries both dominant and recessive traits (as opposed to homozygous which carries only one) - the dominant trait is the one which is expressed (phenotype). A heterozygous trait can be expressed as Rr - "R" the dominant trait and "r" the recessive trait.
What is a trait that masks a trait called?
A trait that masks another trait is called a dominant trait. This means that when an organism carries both dominant and recessive alleles for a particular gene, only the dominant trait will be expressed in the phenotype.
When the trait is on the X-chromosomes what is it called?
It is a sex-linked trait. Genes only found on the X chromosome can result in sex-linked traits. In humans these include hemophilia and color blindness.
What groups get sickle cell disease?
A person can only inherit sickle-cell genes if some of their ancestors came from certain regions in Africa where the inhabitants carry sickle-cell genes. A person with one sickle-cell gene has sickle-cell trait, a milder problem. If both father and mother pass on sickle-cell genes, the child, with two genes, will have sickle-cell disease.
Does it mean that a child would inherit more from the mother than from the father because the egg is bigger than the sperm?
No. They will each get the same genes that make a human a human except for the sex genes. The egg carries its' set of genes and all of the organelles including the mitochondria. The sperm carries only its' set of genes.
