Quarter 1: Lesson 3

Question 1

a branch of biology concerned with the study of genes, genetic variation and heredity in organisms.

Answer 1

Genetics

Question 2

a process by which genetic information is passed on from parents to children.

Answer 2

Inheritance

Question 3

a different form of gene that controls a certain trait

Answer 3

Allele

Question 4

two different alleles of contrasting pair fully expressed at the same in the heterozygous individual.

Answer 4

Codominance

Question 5

any difference between cells, individual organisms or groups of organisms of any species.

Answer 5

Variation

Question 6

it is a unit of heredity; a section of DNA that codes for a specific trait.

Answer 6

Gene

Question 7

physical feature or trait of an organism.

Answer 7

Phenotype

Question 8

genetic makeup of an organism.

Answer 8

Genotype

Question 9

This means having two different alleles of a particular gene.

Answer 9

Heterozygous

Question 10

This means having two particular alleles of a particular gene.

Answer 10

Homozygous

Question 11

graphical representation of the possible genotypes of an offspring arising from a particular cross or breeding event.

Answer 11

Reginald Punnett

Question 12

Father of Genetics

Answer 12

Gregor Mendel

Question 13

This is a type of inheritance wherein the patterns of phenotypes do not coincide with those that was presented in the Mendelian Law of inheritance.

Answer 13

Non-Mendelian Inheritance

Question 14

It is a form of intermediate inheritance in which one allele does not completely dominate another allele, resulting in a new phenotype.

Answer 14

Incomplete Dominance

Question 15

occurs when both alleles are expressed equally in the phenotype of the heterozygous offspring, exhibiting the traits of both parents.

Answer 15

Codominance

Question 16

female chromosomes

Answer 16

xx

Question 17

male chromosomes

Answer 17

xy

Question 18

Genes that are carried by either sex chromosome

Answer 18

sex-linked.

Question 19

refers to the inheritance of traits that are expressed only in either the male or the female offspring due to their expression being influenced by differences in the anatomy of males and females.

Answer 19

Sex limited inheritance

Question 20

is a trait controlled by a pair of alleles found on the autosomal chromosomes (pairs 1 through 22) but its phenotypic expression is influenced by the presence of certain hormones.

Answer 20

Sex-Influenced Traits

Question 21

(sometimes called “male pattern baldness,” though the condition isn’t restricted to males). This gene has two alleles, “bald” and “non-bald.”

Answer 21

Pattern baldness

Question 22

Pattern baldness in humans (sometimes called “male pattern baldness,” though the condition isn’t restricted to males). This gene has two alleles, “bald” and “non-bald.” The behaviors of the products of these genes are highly influenced by the hormones in the individual, particularly by the hormone ________.

Answer 22

testosterone