U2 - L2 Presentation - 8th grade

Multiple Choice

Why is it important to understand how traits are passed from parents to offspring?

• It helps us predict genetic diseases and understand evolution.

• It allows us to choose our traits before birth.

• It determines our intelligence and personality completely.

• It is only useful for scientists and not for everyday life.

Open Ended

What is one trait you share with your parents or siblings, and why do you think you inherited it?

Multiple Choice

What was Gregor Mendel's key discovery about how traits are inherited?

• Traits blend together in offspring

• Traits are passed through factors that follow specific patterns

• Traits are only inherited from the mother

• Traits skip every other generation

Open Ended

Explain the relationship between genes, chromosomes, and DNA as described in the lesson.

Multiple Select

Which of the following statements about chromosomes is/are correct?

• All body cells have the same number of chromosomes except sex cells

• Humans have 80 chromosomes in their body cells

• Sex cells have half the number of chromosomes as body cells

• Every species has a specific chromosome number

Open Ended

Why might we need so many genes?

Fill in the Blank

Humans have between 20,000 and ___ genes on their 46 chromosomes.

Fill in the Blank

You get 23 chromosomes from ___ and 23 from ___ .

,

Multiple Choice

What does a shaded figure represent in a pedigree chart?

• Expresses the trait

• Carries the trait but does not express it

• Is deceased

• Represents a generation

Multiple Choice

If a father has brown eyes (dominant trait) and a mother has blue eyes, and their children include both brown-eyed and blue-eyed individuals, what must be true about the father's genotype?

• He is heterozygous (Bb)

• He is homozygous dominant (BB)

• He is homozygous recessive (bb)

• He is homozygous for blue eyes

Multiple Select

Which of the following statements about carriers in a pedigree are correct?

• Carriers have one copy of the recessive allele

• Carriers do not express the trait

• Carriers can pass the trait to their offspring

• Carriers always show the trait

Open Ended

Explain how recessive traits can appear in a generation even if both parents do not express the trait themselves.

Multiple Choice

During fertilization, what is the result of the fusion of a sperm and an egg cell?

• A zygote with 46 chromosomes

• A zygote with 23 chromosomes

• A gamete with 23 chromosomes

• A gamete with 46 chromosomes

Fill in the Blank

Human sex cells each have ___ chromosomes.

Multiple Choice

Which of the following is NOT a characteristic of meiosis?

• Reduces chromosome number by half

• Creates four daughter cells from one parent cell

• Each daughter cell is genetically identical

• Essential for sexual reproduction

Open Ended

Why is genetic diversity important for species survival?

Multiple Select

Which of the following statements correctly describe differences between mitosis and meiosis?

• Mitosis creates two identical body cells

• Meiosis creates four genetically different sex cells

• Mitosis reduces chromosome number by half

• Meiosis maintains chromosome number

Multiple Choice

Which of the following is a fun fact about genetics?

• Your DNA contains about 1 million base pairs

• Identical twins have different DNA

• You share 99.9% of your DNA with every other human

• Bananas share about 10% of their DNA with humans

Fill in the Blank

Bananas share about ___ percent of their DNA with humans.

Open Ended

Analyze how a recessive genetic disorder could appear in a family where neither parent shows the trait.

Multiple Choice

A characteristic that is passed from parent to offspring

• inherited trait
• chromosome
• pedigree
• DNA