The following need to be included in your paragraph:
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Introduction Sentence
Dominant allele definition
Recessive allele definition
Genotype v.s Phenotype
3 traits and their description
Closing sentence
Model Paragraphs developed in classes today… DO NOT COPY WORD FOR WORD! USE THIS
AS A GUIDE:
Period 1:
Whenever a dominate allele is present, this trait will show up. Dominant alleles are
represented by a capital letter. A recessive allele is always hidden in the presence of a dominant
allele. It represented by a lowercase letter. The genotype describes the allele combination or
genetic code, and the phenotype describe how your traits physically look.
Look at the genotype for widow’s peak, it is ww. Since both alleles are homozygous
recessive, then the phenotype is absent. My baby face does not have a widow’s peak. Look at
the genotype for eyelashes, it is Ll. Since the alleles are heterozygous, then the phenotype is
long. My baby face has long eyelashes. Look at the genotype for freckles it is ff. Since both
alleles are homozygous recessive, then they phenotype is absent. My baby face does not
have freckles.
Period 2:
Eduardo is the baby face I created in Science class. We used genetics to determine his
genotype and phenotype. The difference between a genotype and phenotype is that the
genotype is the allele combination or the genetic code while the phenotype is the physical
appearance. You will always have two alleles for a trait, one from your mom and one from your
dad. If you have a dominant allele it will always show that trait. If you have a recessive allele it
will only show if a dominant allele is not present.
Look at the genotype for widow’s peak, it is ww. Since both alleles are homozygous
recessive then the phenotype is absent. Eduardo does not have a widow’s peak. Look at the
genotype for position of eyebrows, it is Cc. Since the alleles are heterozygous, Eduardo’s
eyebrows are not attached. Look at the genotype for freckles, it is ff. Since the alleles are
homozygous recessive, Eduardo does not have freckles. Eduardo is unique because of his
unique combination of traits.
Period 3:
Juan’s appearance is based on his phenotype, which is determined from his genotype. A
genotype is a complete set, where you inherit traits from your mom and dad. A phenotype is
how your traits appear. In your genotype there is a combination of dominant and recessive
alleles. A dominant allele is defined as a trait that shows up in an organism when it is present. A
recessive allele is hidden whenever a dominant allele is present.
Juan has bushy eyebrows, because his allele combination is BB. This is homozygous
dominant and that is why this trait is present. Look at the genotype for freckles, it is Ff. Since
the alleles are heterozygous, Juan has freckles. Look at the genotype for length of eyelashes, it
is LL. Since the alleles are homozygous dominant, Juan has long eyelashes. Even though my son
Juan has bushy eyebrows I still love him and all his traits.
Period 4:
Have you ever wondered why your characteristic appear the way they do? Your
phenotype is the way you physically appear it determined by the traits passed down from your
parents. Your genotype is your complete set of genes that will never change. Your genotype is
made up of recessive and dominant alleles. A dominant allele will typically show up more often
because when it is present that trait will show up. A recessive allele is a trait that will not show
up if a dominant allele is present.
Look at the genotype for widow’s peak, it is WW. Since the alleles are homozygous
dominant, then the phenotype is a widow’s peak is present. Look at the genotype for length of
eyelashes, it is Ll. Since the alleles are heterozygous, the phenotype is long eyelashes. Look at
the genotype for freckles, it is FF. Since the alleles are homozygous dominant, the phenotype is
present for freckles. There are many genotypes this just explains a few for our baby face.
Period 6:
My baby face’s name is Jake. He is made up of unique traits. These traits are determined
by his genotype and phenotype. A genotype is the complete set of an organism’s genes. A
phenotype is the appearance of a trait. Your traits are determined by the combination of
dominant and recessive alleles. A dominant allele is the trait that will always show up in an
organism and is represented by a capital letter. A recessive trait is hidden whenever a dominant
allele is present and is represented by a lowercase letter.
Look at the genotype for shape of eyes, it is aa. Since the alleles are homozygous
recessive, the phenotype is round eyes. Look at the genotype for cleft in chin, it is Cc. Since the
alleles are heterozygous, the phenotype is absent. Jake does not have a cleft in his chin. Look at
the genotype for eyelash length, it is Ll. Since the alleles are heterozygous, the phenotype is
long eyelashes. Jake only has some of my characteristics because he inherited half of his alleles
from me.
Period 7:
Look at the genotype for cleft chin, it is CC. Since the alleles are homozygous dominant,
Alfred does not have a cleft in his chin. Look at the genotype for dimples, it is Dd. Since the
alleles are heterozygous, Alfred will have dimples. Look at the genotype for freckles it is ff. Since
the alleles are homozygous recessive and that means Alfred will not have dimples.