Genetics 2

Question 1

What is genotype?

Answer 1

Combination of alleles the individual carries.

Question 2

What is phenotype?

Answer 2

Observed physical characteristics/ variation in an organism

Question 3

What is a dominant allele?

Answer 3

An allele that expresses its trait even if only one copy is present. it masks the recessive

Question 4

What is a recessive allele?

Answer 4

An allele that only expresses its trait when two copies are present.

Question 5

What is co-dominance?

Answer 5

Both alleles in a heterozygous individual are fully expressed. Phenotype shows both traits without blending.

e.g- AB blood type.

Question 6

What does homozygous and heterozygous mean?

Answer 6

Homozygous - alleles are the same
Heterozygous - two different alleles

Question 7

What is Mendels First Law, aka the Law of Segregation.

Answer 7

During gamete formation each member of the allelic pair separates from the other member to form the genetic constitution of the gamete.

Question 8

How does Mendels first Law relate to what we know about meiosis?

Answer 8

Meiosis produces four HAPLOID gametes.