PPt. 19: Mendelian Genetics Unit 3

Question 1

Tendency for traits to be passed from parent to offspring

Answer 1

Heredity

Question 2

Units of heredity, composed of sections of DNA that code for some protein

Answer 2

Genes

Question 3

Alternate forms of genes

Answer 3

Alleles

Question 4

Where are alleles located?

Answer 4

Locus

Question 5

Actual make up of genes possessed by an individual

Answer 5

Genotype

Question 6

Describes physical appearance

Answer 6

Phenotype

Question 7

Identical alleles

Answer 7

Homozygous

Question 8

Not identical alleles

Answer 8

Heterozygous

Question 9

During meiosis, the alleles of a gene on homologous chromosomes separate from each other such that each gamete receives only one allele from each pair… this is

Answer 9

Law of segregation

Question 10

Helps predict expected proportions

Answer 10

Punnett Square

Question 11

Random alignment of homologous chromosomes during Metaphase I… this is

Answer 11

Law of Independent Assortment

Question 12

A single gene may influence several different traits

Answer 12

Pleiotropy

Question 13

Diagrams that show the genetic relationships among related individuals

Answer 13

Family Pedigrees

Question 14

Results from a mutation in the gene that codes for the hemoglobin protein that carries oxygen in red blood cells

Answer 14

Sickle-cell anemia

Question 15

Caused by a recessive allele that results in a deficiency in one of the proteins needed for blood clotting

Answer 15

Hemophilia

Question 16

Error in meiosis, affects the number of either sex chromosomes or autosomes

Answer 16

Nondisjunction

Question 17

In women, unable to produce secondary sex characteristics, infertile

Answer 17

Turner Syndrome XO

Question 18

Male born with 2X and 1Y

Answer 18

Klinfelter Syndrome XXY

Question 19

Extra copy of chromosomes

Answer 19

Down Syndrome