Test Cross

Which of the following is NOT an example of a NGSS Cross Cutting concept?

• Patterns

• Cause and Effect

• Sequencing 

Tags

NGSS.HS-ESS2-2

NGSS.HS-ESS2-4

NGSS.HS-PS2-1

Which of the following is NOT an example of a NGSS Cross Cutting concept?

• Scale, Proportion & Quantity

• Constructivism & Inquiry

• Systems & System Models

Which of the following is NOT an example of a NGSS Cross Cutting concept?

• Phenomena & Scientific Learning

• Energy & Matter: Flows, Cycles & Conservation

• Structure & Function

• Stability & Change

Tags

NGSS.HS-LS2-6

What are the CCCs?

• Create Content Creatively

• Cross Cutting Concepts

• Critical Collaborative Communication

• Cross Curricular Content

What is a test cross in genetics?

• A cross between two homozygous individuals

• A cross between two heterozygous individuals

• A cross between an individual with an unknown genotype and a homozygous recessive individual

• A cross between an individual with an unknown genotype and a homozygous dominant individual

In a test cross, what is the purpose of using a homozygous recessive individual?

• To determine the phenotype of the unknown individual

• To determine the genotype of the unknown individual

• To increase genetic diversity

• To produce only dominant traits

Which of the following genotypes would be used in a test cross to determine if an individual is homozygous dominant?

• Homozygous recessive

• Heterozygous

• Homozygous dominant

• None of the above

If a test cross results in a 1:1 phenotypic ratio, what can be inferred about the genotype of the unknown parent?

• The unknown parent is homozygous dominant

• The unknown parent is heterozygous

• The unknown parent is homozygous recessive

• The unknown parent is a mutant

In a test cross, if all offspring show the dominant trait, what is the genotype of the unknown parent?

• Homozygous dominant

• Heterozygous

• Homozygous recessive

• Cannot be determined

Tags

NGSS.HS-LS3-1

Which scientist is credited with developing the concept of the test cross?

• Charles Darwin

• Gregor Mendel

• James Watson

• Francis Crick