inheritance and the discovery of DNA

What is a species?

Two organisms that can breed to produce fertile offspring belong to this group.

What is continuous variation?

A type of variation that can have a value anywhere within a range.

What is mode?

The most common value in a set of data.

What is the double helix?

The name given to describe the structure of a DNA molecule.

What is a gene?

A short length of DNA coding for a characteristic.

What does MRS GREN stand for?

MRS GREN is an acronym for Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, and Nutrition, which are the seven life processes.

How many chromosomes do humans have in a typical body cell?

A human has 46 chromosomes in a typical body cell.

How many chromosomes do egg and sperm cells contain?

Egg and sperm cells contain 23 chromosomes.

What happens during fertilization?

During fertilization, the nucleus of the egg and sperm combine to form an embryo, which has 46 chromosomes.

What is genetic inheritance?

The process by which characteristics are passed from parents to offspring through genes.

Who are the key scientists involved in the discovery of DNA structure?

James Watson, Francis Crick, Rosalind Franklin, and Maurice Wilkins.

What is the role of genes?

Genes code for characteristics and are found on chromosomes.

What is the significance of chromosomes in inheritance?

Chromosomes carry genetic information, with each body cell having two sets of information for all characteristics, one from each parent.

What is the relationship between chromosomes and characteristics?

The two chromosomes in each pair carry information for the same characteristic, such as eye color.

What is the typical number of chromosomes in different species?

Different species have different numbers of chromosomes in their cells.

What is the significance of the number of chromosomes being even?

The numbers are always even because chromosomes exist in pairs, one inherited from each parent.

What is the function of DNA?

DNA carries genetic information and provides the instructions for the development and functioning of living organisms.

What is the structure of DNA?

DNA is structured as a double helix, consisting of two strands that coil around each other.

What are the components of DNA?

DNA is made up of nucleotides, which include a phosphate group, a sugar, and a nitrogenous base.

What is the importance of Rosalind Franklin's work?

Rosalind Franklin's X-ray diffraction images of DNA were critical in revealing the double helix structure.

What is the significance of the fertilized egg?

The fertilized egg, or embryo, contains genetic information from both parents and develops into a new organism.