Genetic Crosses

Question 1

Monohybrid cross

Answer 1

Study of a single characteristic

Question 2

Dihybrid cross

Answer 2

Study of two characteristics

Question 3

Gamete

Answer 3

Haploid cells capable of fusion

Question 4

Fertilisation

Answer 4

The union of two gametes to form a single cell called a diploid zygote (sexual reproduction)

Question 5

Species

Answer 5

A group of organisms that can interbreed and produce fertile offspring

Question 6

Heredity

Answer 6

The passing of traits, using genes, from one generation to the next

Question 7

Gene

Answer 7

A section of DNA that codes for a protein

Question 8

Allele

Answer 8

An alternative form of the same gene

Question 9

Diploid

Answer 9

Cells have only two alleles for any one gene

Question 10

Locus

Answer 10

Where a gene is located on a chromosome

Question 11

Homozygous

Answer 11

Means an individual has identical alleles for a trait (BB or bb)

Question 12

Heterozygous

Answer 12

Means an individual has different alleles for a trait (Bb)

Question 13

Dominant allele

Answer 13

Is the allele that is expressed in the heterozygous condition (B)

Question 14

Recessive allele

Answer 14

Is the allele that is only expressed in the homozygous expression (b)

Question 15

Genotype

Answer 15

Is the genetic makeup of an organism (pairs of alleles/ genes that are present)

Question 16

Phenotype

Answer 16

Is the physical appearance of the organism and is produced from the interaction of the genotype and the environment (traits that are shown )

Question 17

Incomplete dominance

Answer 17

When neither allele masks the expression of the other (neither is dominant)

Question 18

Progeny

Answer 18

Offspring produced