Traits that are determined by the instructions a person carries on one gene are called _____ traits. single gene. More than _____ human traits are determined by the instructions a person carries on a single gene. 9000 _____ _____ traits are traits because they always produced offspring with the same variant of the trait as the parents.
Single Gene Traits Traits that are determined by the instructions a person carries at one gene EX:attached/unattached earlobes Laws of Segregation and Assortment Only one of the two alleles for a gene is put into a gamete. At fertilization, offspring receive from each parent one allele for each gene. Phenotype Outward appearance of an individual.
genetic makeup of individual (can refer to single gene or entire genome) phenotype appearance, observable expression of genotype (does not always express genotype)
a failure to properly partition the organelles and the cytoplasm. a specific mutation in a single gene. failure of chromosomes to separate properly during meiosis. An unaffected man and an unaffected woman have a son with Lesch-Nyhan syndrome, an X-linked recessive trait.
Genetic disorders determined by a single gene (Mendelian disorders) are easiest to analyze and the most well understood. If expression of a trait requires only one copy of a gene (one allele), that trait is considered dominant.
Mendelian inheritanceSingle gene-pair inheritance occurs when a trait is linked to one gene-pair that consists of two alleles. This is also referred to as Mendelian inheritance. An allele is one part of the gene-pair. One allele is inherited from the father, and one is inherited from the mother.
While a few traits are due to only one gene (and its alleles), most human genetic traits are the product of interactions between several genes.
Single gene disorders are caused by DNA changes in one particular gene, and often have predictable inheritance patterns. Over 10,000 human disorders are caused by a change, known as a mutation?, in a single gene?. These are known as single gene disorders.
Some of the more common single-gene disorders include cystic fibrosis, hemochromatosis, Tay-Sachs, and sickle cell anemia. Even though these diseases are primarily caused by a single gene, several different mutations can result in the same disease but with varying degrees of severity and phenotype.
Genes (say: jeenz) play an important role in determining physical traits — how we look —and lots of other stuff about us. They carry information that makes you who you are and what you look like: curly or straight hair, long or short legs, even how you might smile or laugh.
Height and other similar features are controlled not just by one gene, but rather, by multiple (often many) genes that each make a small contribution to the overall outcome. This inheritance pattern is sometimes called polygenic inheritance (poly- = many).
More than 9000 traits are determined by a single gene. You just studied 31 terms!