Genetics Test Review

Question 1

What is the genotype that occurs when sex chromosomes combine to form a male offspring.

Accepted Answer

XY

Question 2

The father of genetics was an Austrian monk named _____.

Accepted Answer

Gregor Mendel

Question 3

An organism that has two of the same alleles for a trait is called a ____ .

Accepted Answer

purebred

Question 4

All of the possible outcomes of a genetic cross comes from a _____.

Accepted Answer

Punnett square

Question 5

When sex cells combine, each sex cell has _____.

Accepted Answer

one half the normal number of chromosomes

Question 6

To a scientist, the notation TT indicates ______.

Accepted Answer

two dominant alleles

Question 7

The likelihood that a particular event will occur is called _____.

Accepted Answer

probability

Question 8

What does codominance mean in genetics?

Accepted Answer

The alleles are neither dominant nor recessive.

Question 9

The physical characteristics that are studied in genetics are called ______.

Accepted Answer

traits

Question 10

An organism that has two different alleles for a trait has a condition called _____.

Accepted Answer

heterozygous

Question 11

Different forms of a gene are called _____.

Accepted Answer

alleles

Question 12

To a scientist, the notation Tt indicates ______.

Accepted Answer

one dominant and one recessive allele

Question 13

An organism that has two different alleles for a trait is called a _____ .

Accepted Answer

hybrids

Question 14

Traits are controlled by _____ .

Accepted Answer

genes

Question 15

When both alleles can be independently observed in a phenotype it is called ______.

Accepted Answer

codominance

Question 16

An organism's physical appearance is its ______.

Accepted Answer

phenotype

Questions 16