Which of the following is true of dominant traits

( p is the frequency of one allele, and qВ =В 1В в€’ p is the frequency of the other allele. The frequency of the carrier state can be calculated by the Hardy-Weinberg formula: Recessive genes will also show a horizontal inheritance on a pedigree chart. In other words, the subject is homozygous for the trait. In opposition to autosomal dominant trait, a recessive trait only becomes phenotypically apparent when two copies of a gene (two alleles) are present. They are not recessive in males because males only have 1 X chromosome so there is not a non-diseased version of the gene to default to.ДЄutosomal recessive or autorecessive is a mode of inheritance of genetic traits located on the autosomes (the 22 non-sex determining chromosomes). X chromosome diseases are recessive in females unless both of their X chromosomes have the gene. Diseases carried on the Y chromosome cannot be recessive. Examples of recessive genes in Mendel's famous pea plant experiments include those that determine the color and shape of seed pods, and plant height.ДЄllosomal recessive is a mode of inheritance of genetic traits located on the allosomes (the sex determining chromosomes).Д®xamples include the gene for hemophilia which is carried on the X chromosome. The term 'recessive gene' is part of the laws of Mendelian inheritance created by Gregor Mendel. Thus if the parents are closely related (in-breeding) the probability of both having inherited the same gene is increased and as a result the probability of the children showing the recessive trait is increased as well. If both parents are carriers, there is a 25% chance with each child to show the recessive trait in the phenotype. Instead, 'expression' here refers to the observance of the gene within the phenotype. Note that 'expression' in this sense does not refer to genetic expression (i.e., transcription and translation) of the gene. Thus, both parents have to be carriers of a recessive trait in order for a child to express that trait. If a genetic trait is recessive, a person needs to inherit two copies of the gene for the trait to be expressed. Every person has two copies of every gene on autosomal chromosomes, one from mother and one from father. In genetics, a recessive gene is an allele that causes a phenotype (visible or detectable characteristic) that is only seen in a homozygous genotype (an organism that has two copies of the same allele) and never in a heterozygous genotype.

Which of the following is true of dominant traits