Honors Biology Unit 4.6: Mendelian Genetics

An allele whose phenotype always shows up in the organism when the allele is present (e.g., in both homozygous and heterozygous individuals).

• recessive allele

• dominant allele

• hidden allele

• present allele

An allele whose trait only shows up when no dominant allele is present.

• hidden allele
• dominant allele
• recessive allele
• present allele

Having two of the same genes for the trait (sometimes called purebred).

• homozygous

• hetrozygous

• protein

• chromosome

Tags

NGSS.HS-LS3-1

Having two different alleles for a trait.

• protein

• homozygous

• heterozygous

• genotype

What is a phenotype?

• The expression of a trait; physical appearance.

• Refers to the genetic makeup of an individual

• An organism that has the same genes for a trait (ex. TT or tt)

• The passing of traits from parent to offspring

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

The gene makeup or combination of alleles an organism has for a particular trait is known as its

• dominance

• phenotype

• allele

• genotype

What gender has an X and a Y chromosome?

• male

• female

This karyotype depicts

• Turner's

• Edward's

• klinefelter's

• Down's Syndrome

Tags

NGSS.HS-LS3-2

Assume the dark color indicates a dominantly inherited trait. How many people in this pedigree lack the trait?

• 3

• 4

• 6

• 10

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2