Chapter 14

Question 1

Phenotype

Answer 1

The observable features of individual appearance is called the phenotype.

Question 2

Mendel’s phenotype

Answer 2

Seed color, shape, pod shape, pod color

Flower color, position, and stem length.

Question 3

Alleles

Answer 3

Alternative version of genes. A sequence of nucleotides that cod for a gene.

Question 4

Homozygous

Answer 4

A true breed. Both alleles have either both the dominant or both recessive genes.

Question 5

Heterozygous

Answer 5

Having one recessive and one dominate gene. The dominate gene will show its phenotype trait.

Question 6

Principle of segregation

Answer 6

Homologous chromosomes separate during meiosis so NO gamete has both copies of alleles for a particular gene. They have only on copy.

Question 7

Recombinant

Answer 7

Traits that are combines between dominate and recessive Yyrr= dominant yellow but wrinkled recessive

Question 8

Independent Assortment

Answer 8

Combinations of two traits appearing in F2, next t appearing in the parent group, means that traits can be sorted into different genes independent of one another.

Question 9

Dominant inheritance

Answer 9

An individual only needs one allele to have the trait. Dominantly inherited disorders, when looking at pedigree, tend to have more individuals in the family tree that are affected, which is less in recessive inheritance.

Question 10

Incomplete dominance

Answer 10

Heterzygotes have an intermediate phenotype.
RR=red
rr=white
So Rr= pink
Basically both alleles are active (co-dominant alleles)

Question 11

Codominance

Answer 11

Both genes are expressed and you see products of both alleles. Neither allele is dominant and both phenotypes are shown.