Genetic Crosses And Heredity

Question 1

Gametes

Answer 1

Haploid cells that are capable of fusion

Question 2

Alleles

Answer 2

Alternative forms of the same gene

Question 3

Dominant

Answer 3

Allele that prevents the other allele from being expressed

Question 4

Recessive

Answer 4

Allele that is prevented from being expressed by the other allele

Question 5

Locus

Answer 5

Position of a gene on a chromosome

Question 6

Genotype

Answer 6

Genetic makeup of an organism

Question 7

Phenotype

Answer 7

Physical makeup of an organism

Question 8

Progeny

Answer 8

Offspring that are produced

Question 9

Homozygous

Answer 9

Two alleles are identical

Question 10

Heterozygous

Answer 10

Alleles are different

Question 11

Punnett square

Answer 11

Grid used to show the ratio of the genotypes of the progeny in a genetic cross

Question 12

Incomplete dominance

Answer 12

Neither allele is dominant or recessive. Both alleles are equally expressed in heterozygous genotype to form an intermediate phenotype

Question 13

Pedigree

Answer 13

Diagram showing the genetic history of a group of related individuals

Question 14

Monohybrid cross

Answer 14

Study of a single characteristic

Question 15

Dihybrid cross

Answer 15

Study of two characteristics

Question 16

Linkage

Answer 16

Genes are located on the same chromosome

Question 17

Sex linkage

Answer 17

A characteristic that is controlled by a gene on a sex chromosome

Question 18

Law of segregation

Answer 18

Traits of an organism are governed by a pair of alleles that separate at gamete formation

Question 19

Law of independent assortment

Answer 19

When gametes are formed, each member of a pair of alleles can combine with either member of another pair