Genetics Introduction

Genetics is the study of heredity.

• True
• False

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What percentage of chromosomes are handed down by a sperm cell?

• 75%
• 25%
• 50%
• 100%

Tags

NGSS.HS-LS3-1

What is the definition of a gene?

• A gene is a section or part of your DNA. It is a code for proteins that determines your traits.

• A gene is what you wear to school

• A gene is a physical characteristic you can see

• A gene is located in your nucleus. You inherit one from your mom and one from your dad.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

True or False: Recessive genes are always lowercase and they overpower (or dominate) dominant genes.

• True

• False

This makes up our chromosomes. It is tightly-wound in coils.

• Chromosome

• DNA

• gene

• Allele

Tags

NGSS.HS-LS3-1

What do these letters mean to a scientist: Aa?

• Homozygous dominant

• Homozygous recessive

• Two dominant alleles

• One dominant allele & one recessive allele

Which of the following is an allele?

• Brown hair

• Blue eyes

• T or t

Which of the following is a dominant allele?

• D

• d

Which of the following is a recessive allele?

• G

• g

which of the following is a phenotype?

• Gg

• GG

• Brown hair

• bb