Week 3 Genentics basics

What is an allele?

• A variant form of a gene that determines a specific trait.
• A type of cell division
• A unit of heredity that is passed from parent to offspring
• A type of protein found in cells

Tags

CCSS.L.9-10.4

What are genes?

• Genes are a type of food ingredient used in cooking.
• Genes are types of cells found in the human body.
• Genes are small organisms living in the environment.
• Genes are segments of DNA that contain instructions for building proteins.

What is a dominant gene?

• A dominant gene is a gene that is only expressed in males.
• A dominant gene is a gene that is expressed phenotypically in an individual when only one copy is present in the genotype.
• A dominant gene is a gene that skips generations.
• A dominant gene is a gene that is always recessive.

Tags

CCSS.L.9-10.4

What is a recessive gene?

• A recessive gene is a gene that is always dominant in an individual.
• A recessive gene is a gene that skips generations.
• A recessive gene is a gene that is only expressed when an individual has one copy of it.
• A recessive gene is a gene that is only expressed when an individual has two copies of it, one from each parent.

Tags

CCSS.RI.9-10.4

What does it mean for a set of alleles to be homozygous?

• Having two different alleles for a particular gene
• Having one allele for a particular gene
• Two identical alleles for a particular gene.
• Having no alleles for a particular gene

Tags

CCSS.L.9-10.4

CCSS.RI.9-10.4

What does it mean for two alleles to be heterozygous?

• Heterozygous alleles are always recessive.
• Two alleles are heterozygous when they are different from each other.
• Two alleles are heterozygous when they are identical.
• Heterozygous alleles refer to the presence of only one allele.

What role do chromosomes play in heredity?

• Chromosomes contain proteins that assist in cell division.

• Chromosomes are structures that carry genes, the basic units of heredity, from parents to offspring.

• Chromosomes are found only in animal cells and not in plant cells.

• Chromosomes are a type of gene found within the cell nucleus.