Heredity

What is genetics?

• the study of heredity, which is the process in which a parent passes certain genes onto their children.

• the study of DNA nucleotides and structure of DNA

• the study of cell division

• the study of skin colors

According to this Punnett Square, what is the chance that the offspring will be tall (Tall is dominant)?

• 1

• 1/2

• 1/4

• 3/4

What did Gregor Mendel study to discover genetics?

• Pea Plants

• Pepper Plants

• Fruit Flies

• Tomato Plants

What are Gregor Mendel's discoveries of genetics? (Mark ALL that apply)

• The inherited traits are determined by genes that are passed from parents to children.

• A child inherits two sets of genes—one from each parent.

• A trait may not be observable, but its gene can be passed to the next generation.

• Genes are found on chromosomes inside the cell nucleus

An organism with a dominant allele (trait) will:

• always exhibit that trait

• never exhibit that trait

• only exhibit that trait in the absence of a recessive allele

• only exhibit that trait in the presence of a recessive allele

An organism with a recessive allele (trait) will:

• always exhibit that trait

• never exhibit that trait

• only exhibit that trait when a dominant allele is not present

• only exhibit that trait in the presence of a dominant allele

Dominant alleles are represented with a _________________, and recessive alleles are represented with a ___________________.

• capital letter, lowercase letter

• lowercase letter, capital letter

• capital letter, capital letter

• lowercase letter, lowercase letter

Alleles are

• genes that express different traits

• only passed down from your mother

• always dominant

• the study of heredity

If your mom gave you the allele for brown eyes (homozygous dominant) and your dad gave you an allele for green eyes (homozygous recessive), which phenotype would you will have?

• Bb

• Brown eyes

• Green eyes

• BB

What is a phenotype?

• The physical appearance of a genotype

• The genetic expression of a genotype

• Different versions of the same gene

• Always dominant