8.1 Traits

Question 1

What is genotype?

Answer 1

The combination of alleles

Question 2

What is phentype?

Answer 2

The visible traits that come from the combination of alleles

Question 3

What does it mean to be homozygous?

Answer 3

When both alleles in a pair are either recessive or dominant

Question 4

What does it mean to be heterozygous?

Answer 4

When there is a recessive and a dominant allele in a pair

Question 5

What is co-dominance?

Answer 5

When the both traits from a heterozygous genotype are visible in the phenotype

Question 6

How did Mendel set up his experiments?

Answer 6

He always started with two homozygous plants, one with recessive and one with dominant alleles, he always saw the ratio of 4/4 heterozygous in the resulting plants, and after he bred the second generation he always saw a ratio of 3/4 one phenotype and 1/4 recessive homozygous

Question 7

How does a test cross work?

Answer 7

When two thing’s alleles for a trait are crossed for specific results.

Question 8

What are the parent genotypes if the phenotypic ratio is 4/4 heterozygous?

Answer 8

One homozygous recessive and one homozygous dominant

Question 9

What are the parents genotypes if the phenotypic ratio is 4/4 homozygous recessive?

Answer 9

both homozygous recessive