Review Questions

Genetics

Question 1An organism’s physical

appearance is known as its:

genotype

phenotype homozygous

heterozygous

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Question 2If a homozygous tall plant (TT) is crossed with

a homozygous short plant (tt). What is the probability that the offspring with be tall?

25%

50% 100%

75%

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Question 3What is a mutation?

Any change that is harmful to an organism

Any change that his helpful to an organism

Any change in the phenotype of a cell

Any change in a gene or chromosome

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Question 4

What are genes?

A type of cotton pants

The splitting of cells When both alleles are dominant.

The factors that control traits

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Question 5

What is the difference between heterozygous and homozygous?

Heterozygous has 2 different alleles and

Homozygous has 2 of the same alleles.

Heterozygous means physical characteristics

and Homozygous means genetic makeup.

They mean the same thing.

Homozygous has 2 different alleles and

Heterozygous has 2 of the same alleles.

CORRECT!

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Question 6

What is a segment of DNA on a chromosome?

phenotype

genes genotype

alleles

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Question 7

What is genotype?

The physical appearance of someone

A form of mutation A type of protein

An organisms genetic makeup

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Question 8

What is the different form of a gene?

Co-dominant

Mutation Allele

Meiosis

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Question 9

What is a phenotype?

When an organism has 2 of the same alleles.

An organism’s physical appearance or visible

traits.

When an organism has 2 different alleles.

An organism’s genetic makeup

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Question 10

What does the Chromosome Theory of Inheritance state?

Genes are carried from parents to offspring on

chromosomes.

Chromosomes are carried from parents to offspring

on hybrids

Hybrid pairs of chromosomes combine to

form offspring.

Co-dominant genes combine to form new

hybrids

CORRECT!

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Question 11

What happens in Meiosis?

Chromosomes stay together to form new sex

cells.

Each sex cell loses half of its chromosomes

Each sex cell copies its DNA to form 4 identical

cells.

Chromosomes separate to form sex cells

CORRECT!

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You have completed the review questions.