Heredity L1,L2 (graded)

the scientific study of heredity

• genetics

• heredity

• alleles

• genes

is the passing of characteristics (traits) from parent to offspring. 

• traits

• genes

• heredity

• genetics

specific characteristics that an organism can pass to its offspring through genes.

• genes

• traits

• alleles

• heredity

is the process in sexual reproduction in which an egg cell and sperm cell join to form a new cell. 

• traits

• genetics

• pollination

• fertilization

the organism is the offspring of many generations that have the same form of a trait 

• purebred

• hybrid

• dominant

• recessive

organism has two different alleles for a trait.

• hybrid

• purebred

• dominant

• recessive

In all of Mendel’s crosses, he found that only one form of the trait appeared in the F1 generation. However, in the F2 generation, the “lost” form of the trait always reappeared in about one fourth of the plants.

• true

• false

Scientists use the word ____ to describe the factors that control a trait.

• alleles

• gene

• traits

• heredity

_______ are the different forms of a gene

• traits

• chromosomes

• alleles

• genes

________________ is one whose trait always shows up in the organism when the allele is present. Meaning only one ________________ is needed for this trait to show.

• dominant allele

• recessive allele

• alleles

• genes