Often asked: The one trait that is expressed when two competing traits are present is called?

What is the term used for the one trait that is expressed when two competing traits are present?

A dominant trait is the trait that is expressed when two present traits are competing; it is the one that overrides the recessive gene’s potential influence. In contrast, the recessive trait is the other present trait that is not expressed due to the dominant gene outweighing its possible effect.

Which term is used to describe a trait within an organism that is present but not expressed?

recessive trait. trait within an organism that is present, but is not expressed.

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What is the term for the determination of traits by a combination of both genetic and environmental factors?

Genotype. The determination of traits by a combination of both genetic and environmental factors in which a genotype provides a range within which a phenotype may be expressed.

What term is used to describe twins who are produced when two separate ova are fertilized by two separate sperm at roughly the same time?

Fraternal or ‘dizygotic’ twins

Two separate eggs (ova) are fertilised by two separate sperm, resulting in fraternal or ‘dizygotic’ (two-cell) twins. These babies will be no more alike than siblings born at separate times. The babies can be either the same sex or different sexes, with the odds roughly equal for each.

What is the term for a developing child from 8 weeks?

Your developing baby has already gone through a few name changes in the first few weeks of pregnancy. Generally, your baby will be called an embryo from conception until the eighth week of development. After the eighth week, the baby will be called a fetus until it’s born.

What is the name of the rod shaped portions of DNA?

Cards

Term The new cell formed by the process of fertilization. Definition zygote
Term The substance that genes are composed of that determines the nature of every cell in the body and how it will function. Definition DNA
Term rodshaped portions of DNA that are organized in 23 pairs Definition chromosomes

What is a trait that can be hidden?

Genetics. An allele that is hidden whenever the dominant allele is present. Recessive Allele. One whose trait always shows up in the organism when the allele is present.

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What term describes both alleles being expressed within an offspring?

codominance. A condition in which both alleles for a gene are fully expressed. Monohybrid cross. A cross between individuals that involves one pair of contrasting traits. Dihybrid cross.

What traits could represent the phenotype of an organism?

​Phenotype

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. Some traits are largely determined by the genotype, while other traits are largely determined by environmental factors.

How do genetics and environment work together?

Gene environment interaction is an influence on the expression of a trait that results from the interplay between genes and the environment. Some traits are strongly influenced by genes, while other traits are strongly influenced by the environment.

What is the name of the period from 2 to 8 weeks following fertilization?

The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.

How does the environment and genetics work together to determine human characteristics?

How does the environment and genetics work together to determine human characteristics? Genotype may be affected by the environment and is ultimately expressed in the phenotype. Virtually all human traits, characterisitcs and behaviors are the result of nature vs nuture.

Who carries the twin gene?

The quick answer to this question is that, in a twin pregnancy, it is the mother’s genes that determine twins. First up, giving birth to identical twins is not genetic, but conceiving fraternal twins is. The mother may have the genetic trait of releasing two eggs in one menstrual cycle.

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What are the 3 types of twins?

Types and zygosity

Common name Scientific name Identification
Identical Monozygotic x
Fraternal Dizygotic x
Half-identical Sesquizygotic x
Mirror image x x

What are the 7 types of twins?

The thing that most people don’t know is that there are actually seven different types of twin: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.

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