Genetics

Question 1

When purebred short plants were crossed w/ purebred tall plants, all the offspring were short.

Accepted Answer

False

Question 2

Organism that is the offspring of many generations of the same trait

Accepted Answer

purebred

Question 3

if a ________ allele is present, its trait will appear in the organism

Accepted Answer

dominant

Question 4

How did Gregor Mendel study different characteristics in his experiments?

Accepted Answer

cross-pollinated plants

Question 5

Term referring to physical characteristics

Accepted Answer

traits

Question 6

sex cells produced in meiosis have twice the number of chromosomes as parent cells

Accepted Answer

False

Question 7

Pea plant that's heterozygous for tall stems has Tt for alleles

Accepted Answer

True

Question 8

What does the notation TT mean?

Accepted Answer

2 dominant alleles

Question 9

What does a punnett sqaure show?

Accepted Answer

all possible outcomes of a genetic cross

Question 10

define genotype

Accepted Answer

genetic makeup

Question 11

Hybrid is offspring of parents that have different alleles for a trait

Accepted Answer

True

Question 12

What happens during meiosis?

Accepted Answer

chromosomes pairs separate & are distributed into new sex cells

Question 13

What is the chromosome theory of inheritance?

Accepted Answer

genes carried from parents to offspring on chromosomes

Question 14

Probability of producing tall plant from genetic cross between 2 hybrid talls

Accepted Answer

3/4

Question 15

Traits that are influence by both inheritance & environmental factors

Accepted Answer

ability to sing well

Question 16

Purebred chicken w/ white feathers + purebred black feathers = offspring w/ Black & white

Accepted Answer

alleles are neither dominant or recessive

Question 17

organism's phenotype is its allele combinations

Accepted Answer

False

Question 18

Process where a parent cell divides twice to produce sex cells

Accepted Answer

meiosis

Question 19

Alleles that are neither dominant nor recessive produce an inheritance pattern known as

Accepted Answer

codominance

Question 20

Principles used by Mendel to predict the percentage

Accepted Answer

Probability

Questions 20