Readers ask: When Two Or More Sets Of Alleles Affect The Same Trait In An Additive Fashion, It Is Termed?

When two or more sets of alleles affect the same trait in additive fashion it is called?

Polygenic inheritance. When two or more sets of alleles affect the same trait in an additive fashion, it is termed. Multiple alleles.

When two of the same allele are inherited the genotype is called ___?

If an individual inherits two identical alleles, their genotype is said to be homozygous at that locus. However, if they possess two different alleles, their genotype is classed as heterozygous for that locus. Alleles of the same gene are either autosomal dominant or recessive.

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When a single trait is controlled by more than one set of alleles it is referred to as a <UNK> trait?

Polygenic Traits. -when a single trait is controlled by more than one set of of alleles or genes. -influenced by environment.

What genetic disorder is associated with the lack of an enzyme necessary for the normal metabolism of the amino acid phenylalanine quizlet?

A defective gene (genetic mutation) causes PKU, which can be mild, moderate or severe. In a person with PKU, this defective gene causes a lack of or deficiency of the enzyme that’s needed to process phenylalanine, an amino acid.

What are three exceptions to Mendel’s observations?

The three exceptions to Mendel’s observations are codominance, incomplete dominance and pleiotropy.

What are the four exceptions to Mendelian rules?

These include:

  • Multiple alleles. Mendel studied just two alleles of his pea genes, but real populations often have multiple alleles of a given gene.
  • Incomplete dominance.
  • Codominance.
  • Pleiotropy.
  • Lethal alleles.
  • Sex linkage.

When two alleles of a particular gene are the same?

Each pair of alleles represents the genotype of a specific gene. Genotypes are described as homozygous if there are two identical alleles at a particular locus and as heterozygous if the two alleles differ.

What determines if a genetic trait is expressed?

Diploid organisms inherit two alleles for each gene; one allele from each parent. Interactions between alleles determine an organism’s phenotype. If an organism inherits two of the same alleles for a particular trait, it is homozygous for that trait. In co-dominace relationships, both alleles are fully expressed.

What is an example of multiple alleles trait?

The best characterized example of multiple alleles in humans is the ABO blood groups, discussed in the Non-Mendelian Inheritance concept. Other human traits determined by multiple alleles would be hair color, hair texture, eye color, built, physical structures, etc.

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What does it mean to say a trait is controlled by multiple alleles?

Definition and Examples With multiple alleles, that means there are more than two phenotypes available depending on the dominant or recessive alleles that are available in the trait and the dominance pattern the individual alleles follow when combined together.

What is a trait called when it is controlled?

A trait that is controlled by more than one gene is called polygenic which translates to “multiple genes”. The genes work together to make one trait. Examples are skin, eye and hair color.

When two different traits are investigated at the same time what type of cross does this represent?

When two different traits are investigated at the same time, what type of cross does this represent? Genes that are found on the X chromosomes, but not on the Y chromosome or on autosomes are, X-______genes. You just studied 41 terms!

Which genetic disorder is the result of a deletion of a section of an individual’s chromosome?

Down syndrome (also known as trisomy 21) is an example of a condition caused by trisomy. People with Down syndrome typically have three copies of chromosome 21 in each cell, for a total of 47 chromosomes per cell. Monosomy, or the loss of one chromosome in cells, is another kind of aneuploidy.

When homologous chromosomes fail to separate during meiosis This is termed quizlet?

What is a karyotype? What is nondisjunction? occurs when homologous chromosomes or sister chromatids fail to separate during meiosis, resulting in an abnornal chromosome number.

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