Biology chap 9

one allele is completely dominant over another

When only one characteristic is tracked

A trait not observable in a organisms appearance when the trait is paired with a dominant trait

a trait expressed only when 2 recessive alleles for the same characteristic are inherited

The offspring of the P generation that was crossed pollinated

Are genetically determined variantof a characteristic

When both alleles for a gene are expressed in a heterozygous offspring

pollen from the flower anthers goes to stigma on the SAME FLOWER or A FLOWER ON THE SAME PLANT

States that a pair of factors separated during the formation of gametes

= # of times an event is EXPECTED TO HAPPEN / # of times an event COULD HAPPEN

A _________ is a segment on a chromosome that controls a particular hereditary trait

science of Heredity and of the mechanisms by which traits are pass from parents to offspring

Gregor Mendel was ....

cross a unknown genotype w/ a homozygous recessive individual to determine the unknown genotype

States that factors separate INDEPENDENTLY of one another during the formation of Gamez

At thread-like structure made up of DNA

Describes an individual that has two DIFFERENT alleles for a trait

Chromosomes, _______occur in pairs

When the two alleles in the pair are different

Chromosomes are threadlike structures made up of _________

The Offspring produced by the F1 generation through self pollination

A genetically determined variant of a characteristic

Between flowers of two different plants

Mendel’s factors are

When offspring have a phenotype (appearance) in between that the parents

One of the alternative forms of a gene that governs a characteristic, such as hair color

These occur in pairs

An organisms genetic make up

Describes the allele that is fully expressed when carried by a pair of homologous chromosomes

the transmission of characteristics from parents to offspring is....

A trait that masks or dominates another trait in the pair of alleles

Genetics is a branch of biology defined as....

Capital letters refer to

What is a punnets square used for

Neither allele is dominant or recessive, nor do the alleles blend in the phenotype (appearance)

Gregor Mendel discovered ...

Lowercase letters refer to

plants that are true breeding

When both alleles of a pair are alike

A gene is a segment on a chromosome that controls particular _______ ______

An organisms appearance

The parents that were produced though true-breeding (were created through self pollination)

Plants that are true breeding

Gregor Mendel studied ...

A cross in which two characteristics or tract

when pollen from a male flower is transferred to the female reproductive part of a flower

Describes an individual that has identicle alleles for a trait on both homologous chromosomes