Unit 7: Genetics

Question 1

Is the study of heredity. Genetics involves study is the passing of traits from parents to offspring.

Answer 1

Genetics

Question 2

Is the passing of traits from parents to offspring.

Answer 2

Heredity

Question 3

Are the characteristics of an organism. Examples are eye color, freckles, height or dimples.

Answer 3

Traits

Question 4

Chromosomes are thread-like structures in the nucleus of cells that carry genetic information. A chromosome consists of a long strand of DNA containing many genes.

Answer 4

Chromosome

Question 5

Deoxyribonucleic acid (DNA) is a molecule made up of nucleotides that contains genetic information for cell growth, division and function.

Answer 5

DNA

Question 6

A gene is a segment on a chromosome that determines a specific trait. Genes are the units of heredity.

Answer 6

Gene

Question 7

The genetic make up or code of an organism - Ex: BB, Bb, bb

Answer 7

Genotype

Question 8

The observable traits or physical appearance of an organism - Ex: brown eyes or blue eyes.

Answer 8

Phenotype

Question 9

If an organism has two of the same kind of gene for a trait, it is called pure or homozygous.
Example: Homozygous brown eyes (BB) ~ Homozygous blue eyes (bb)

Answer 9

Homozygous

Question 10

An organism with two different alleles for a trait is called heterozygous or hybrid.
Example: A heterozygous tall plant (Tt) expresses the dominant allele (T or tall) and thus, is tall.

Answer 10

Heterozygous