EXAM-Biology Ch. 9: Genetics

Question 0

What are the differences between homozygous and heterozygous alleles?

Answer 0

Homozygous- 2 similar alleles (TT or tt)

Heterozygous- 2 alleles that are different (Tt)

Question 1

In Mendel’s experiments, what were the results of the F1 generation?

Answer 1

The results showed only the dominant (purple) trait

Question 2

What do the letters Tt represent?

Answer 2

Each letter represents one allele. This is a heterozygous individual

Question 3

In a punnet square, what do the letters inside the box represent?

Answer 3

The offspring of a cross

Question 4

What are the parts of a chromosome?

Answer 4

2 chromatids and a centromere

Question 5

Who is Gregor Mendel?

Answer 5

The father of genetics; worked with pea plants

Question 6

What are the differences between dominant and recessive?

Answer 6

Dominant masks recessive

Recessive is masked by dominant allele

Question 7

What is a phenotype? What is a genotype?

Answer 7

Phenotype- physical appearance of an organism based on the genotype
Genotype- the genetics of an organism

Question 8

What is the difference between a monohybrid and dihybrid cross?

Answer 8

Monohybrid- involves only 1 trait

Dihybrid- crosses of 2 traits