Genotype and Phenotype Concepts

This video from Mumu Math and Science explains the difference between genotype and phenotype. Genotype refers to the genetic makeup of an organism, including its complete set of genes, known as the genome. The human genome consists of approximately 3 billion base pairs of DNA and about 20,000 to 25,000 genes, organized into 23 pairs of chromosomes. Genotype can also refer to the alleles, or different forms of a gene, that an organism carries. Examples include homozygous dominant, heterozygous, and homozygous recessive genotypes. Phenotype, on the other hand, is the expression of these genetic traits, such as eye color. The video concludes with a reminder to practice kindness.

What does the term 'genotype' broadly refer to?

• The physical appearance of an organism

• The genetic makeup of an organism

• The environment of an organism

• The behavior of an organism

Approximately how many base pairs of DNA make up the human genome?

• 1 billion

• 2 billion

• 3 billion

• 4 billion

How many pairs of chromosomes are in the human genome?

• 21 pairs

• 22 pairs

• 23 pairs

• 24 pairs

What are alleles?

• Different forms of the same gene

• Different organs

• Different types of cells

• Different species

Which genotype represents a homozygous dominant trait?

• Big B Big b

• little b little b

• Big B little b

• Big B Big B

What does a heterozygous genotype consist of?

• Two recessive alleles

• Two dominant alleles

• One dominant and one recessive allele

• Two identical alleles

What is the phenotype in the context of genetics?

• The expression of a trait

• The genetic code of a trait

• The environment of an organism

• The behavior of an organism

Which of the following is an example of a phenotype?

• little b little b

• Big B Big B

• Big B little b

• Brown eyes

What is the main difference between genotype and phenotype?

• Genotype is the expression, phenotype is the genetic code

• Genotype is the environment, phenotype is the behavior

• Genotype and phenotype are the same

• Genotype is the genetic code, phenotype is the expression