Our eye color, hair color, or if we have freckles or not, are all considered (4)_11. The traits that we inherit
are determined by small segments of DNA called (5). We get these features from our parents; the
transfer of traits from parents to offspring is called (6)_. Some traits are always seen if they are
inherited, and these are called (7)_... Brown eyes are an example of this type of trait. Blue eyes,
however, are an (8)___ trait and are only seen in the absence of a dominant trait.

Traits are inherited, and coded by genes. Genes are DNA segments placed in chromosomes. Alleles code for different expressions of the same trait. 4) trait / 5) gene / 6) heredity / 7) dominant / 8) recessive.

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We know that phenotype is influenced by genotype and the action of the environment.

Part of an individual's phenotype is due to the genotype -inherited by the parents-, and the other part is due to the environment, where the individual develops.

According to this, inheritability might be defined as the proportion of phenotypic variation that might be due to genetic effects.

Regarding the genetic factor, inheritability is conditioned to heredity.

Heredity might be understood as the process of transmission of different characteristics through generations.

Morphological and behavioral characteristics are traits.

Genes are the hereditable DNA fragments that transmit the information needed to specify traits. This information passes from parents to offspring, generation to generation.

Genes are physically placed and arranged in the chromosomes. Each chromosome contains many genes that might vary in length.

Genes are inherited and define the individual's phenotype.

Alternative forms of genes -alleles- is what determine the phenotypic variation.

Each individual inherits a set of genes from each parent that combine during fertilization.

According to this combination, each individual will express a phenotype that is the product of a mixture between both parents' genetic charges.

According to Mendel, each individual has a pair of factors -alleles-, and each factor codes for an alternative form of the same trait -for instance, tall and short-. He thought that these factors separate -segregate- during gamete formation.

In complete dominance, the dominant allele completely masks the recessive allele effect. This is evident in heter0zyg0us individuals that only express the dominant trait. The dominant allele is hiding the expression of the recessive allele.

Knowing this, we can complete the sentences.

Our eye color, hair color, or if we have freckles or not, are all considered (4) _CHARACTERISTICS or TRAITS_

The traits that we inherit are determined by small segments of DNA called (5) GENES .

We get these features from our parents; the transfer of traits from parents to offspring is called (6)_HEREDITY_.

Some traits are always seen if they are inherited, and these are called (7)_DOMINANT TRAITS_. Brown eyes are an example of this type of trait.

Blue eyes, however, are (8) _RECESSIVE_ traitS and are only seen in the absence of a dominant trait.

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