Biology: Genetics basics

Question 1

Which is an example of a polygenic trait?

Accepted Answer

eye color

Question 2

____ of offspring would have the same phenotype as the parents if the cross was Yy by Yy?

Accepted Answer

75%

Question 3

Which is an example of incomplete dominance?

Accepted Answer

a pink snap dragon flower with red and white parents

Question 4

Which genotype represents a recessive trait?

Accepted Answer

pp

Question 5

What is an allele?

Accepted Answer

an alternative form a gene

Question 6

Recessive traits are always homozygous.

Accepted Answer

True

Question 7

What are the parents of the punnett square below?

Accepted Answer

tt, Tt

Question 8

What are the genotypes for a purebred dominant and purebred recessive plant for a given trait?

Accepted Answer

All are heterozygous dominant

Question 9

What is the best definition of genotype?

Accepted Answer

set of alleles for a given trait

Question 10

What term describes a gene with two dominant alleles that are both expressed at the same time?

Accepted Answer

codomiance

Question 11

What is the name of the 1st two individuals that are crossed in a breeding experiment?

Accepted Answer

P generation

Question 12

Which statement is true of the plant offspring using the Punnett Square below?

Accepted Answer

100% of the offspring will be tall.

Question 13

Which statement is true of a plant with genotype TT and another with genotype Tt?

Accepted Answer

both have the same phenotype

Question 14

The law of segregation states that ________.

Accepted Answer

allele pairs separate during gamete formation

Question 15

What is the ratio of offspring when 2 heterozygous plants (Tt) for a certain trait are crossed?

Accepted Answer

25% TT : 50% Tt : 25% tt

Questions 15