Introduction of Genetics

Genetics

the study of heredity in organisms

Which statement describes Mendel's hypotheses regarding gametes?

A gamete carries one allele for a gene.

Recessive

a word describing a hidden trait of an organism that is masked by a dominant trait

Dominant

a word describing a visible trait of an organism that masks a recessive trait

F2 generation

the offspring of the F1 generation in Mendel's experiments

F1 generation

the offspring of the P generation in Mendel's experiments

P generation

the parental generation in Mendel's experiments

Heredity

the process of passing traits from parents to offspring

What number should replace the letter x in the "Seed color" row?

2,001

The flowchart below shows the three generations of a cross between a pea plant that has yellow pods and a pea plant that has green pods. Yellow pods are the dominant trait. The flowchart is missing the labels that describe the traits. http://media.education2020.com/evresources/3209-06-01/mc006-1.jpg

A, C, and D

During an experiment, a scientist crosses a pea plant that has purple flowers with a pea plant that has white flowers. The plants that result from this cross in the F1 generation have both purple and white flowers. What can the scientist conclude?

The plants in the P generation were not true-breeding.

Scientists often use fruit flies as a method to test hypotheses about human genes. Why are fruit flies advantageous in the study of human inheritance?

They reproduce quickly and take up little space.

Which is the best example of a hypothesis leading to new experimental methods?

Thomas Hunt Morgan continued the genetic research of Gregor Mendel, but Morgan used fruit flies.

Nucleic acids offer variability because they contain alternate forms of genes called

alleles

A scientist wants to examine a genetic disease in humans. The scientist hypothesizes that the disease can be treated by using gene therapy. Humans take a long time to reproduce and develop, so the scientist will have to

develop new methods to test the hypothesis.

Gregor Mendel's research formed the basis of the field of

genetics.

What controls traits and inheritance?

nucleic acids

Allele

the gene form for each variation of a trait