Different versions of a gene are called alleles . Alleles are described as either dominant or recessive depending on their associated traits. ... The resulting characteristic is due to both alleles being expressed equally.
What is the term applied to studying the effects of heredity on psychological characteristics and behavior?
behaviour genetics, also called psychogenetics , the study of the influence of an organism’s genetic composition on its behaviour and the interaction of heredity and environment insofar as they affect behaviour.
What is the term used for the one trait that is expressed when two competing traits are present?
Different versions of a gene are called alleles . Alleles are described as either dominant or recessive depending on their associated traits. ... The resulting characteristic is due to both alleles being expressed equally.
Which term is used to refer to an observable trait?
A phenotype is an individual’s observable traits, such as height, eye color, and blood type. The genetic contribution to the phenotype is called the genotype.
What is one form of a trait?
Although an individual gene may code for a specific physical trait, that gene can exist in different forms, or alleles . One allele for every gene in an organism is inherited from each of that organism’s parents. ... Alleles produce phenotypes (or physical versions of a trait) that are either dominant or recessive.
When is a dominant trait expressed?
Dominant: A genetic trait is considered dominant if it is expressed in a person who has only one copy of that gene . ... A dominant trait is opposed to a recessive trait which is expressed only when two copies of the gene are present.
What traits are inherited?
- Eye Colour. Dominant and recessive genes play a role in determining eye colour of the child. ...
- Height. If the father is tall, there is more chance for the child to also be tall. ...
- Dimples. ...
- Fingerprints. ...
- Lips. ...
- Sneezing. ...
- Teeth structure. ...
- Mental disorders.
What are examples of inherited behaviors?
Some human examples of inherited traits are eye color, hair color and the ability to roll one’s tongue . We are the result of genetic combinations 1. They may even act differently.
What is the influence of genetics in human behavior?
Genes influence each individual’s behavioral and psychological characteristics , including intellectual ability, personality, and risk for mental illness—all of which have bearing on both parents and children within a family.
How do genetic factors influence behavior?
Genes, via their influences on morphology and physiology , create a framework within which the environment acts to shape the behavior of an individual animal. The environment can affect morphological and physiological development; in turn behavior develops as a result of that animal’s shape and internal workings.
What are the 3 types of phenotypes?
With one locus and additive effects we have three phenotypic classes: AA, Aa and aa .
Can ones genotype change?
Genotype generally remains constant from one environment to another , although occasional spontaneous mutations may occur which cause it to change. However, when the same genotype is subjected to different environments, it can produce a wide range of phenotypes.
What are the different ways that a trait may be inherited and expressed?
In codominant inheritance , two different versions (alleles) of a gene are expressed, and each version makes a slightly different protein. Both alleles influence the genetic trait or determine the characteristics of the genetic condition.
What are some examples of observable traits?
Phenotype, all the observable characteristics of an organism that result from the interaction of its genotype (total genetic inheritance) with the environment. Examples of observable characteristics include behaviour, biochemical properties, colour, shape, and size .
Is a widow’s peak a dominant trait?
For example, the allele for widow’s peak is dominant and the allele for straight hairline is recessive.
