Chapter 13 Modern understanding of inheiritance

Who are the 4 workers that independently studied hereditary duplicated?

Erich von Tschermak, Hugo de Vries, Carl Coreens, and William Spillman

Who coined the terms for gene and mutation?

Hugo de Vries

Who is credited for the Chomosomal Theory of inheritance?

Walter Sutton and Theodore Boveri

______________________ was the first to show sex linkage of a phenotypic (white eyes) character.

T.H Morgan

What does the chromomal theory state?

That chromosomes carry the unit of hereditary (genes)

Each parent synthesizes gametes that contain only half of their chromosomal complement, equal genetic contributions from each parent.

Is this male or female?

Male

What is non- disjunction?

Occurs when homogenous chromosomes or sister chromatids fail to separate during meiosis, resulting in an abnormal chromosome number

Is this Paracentric or Pericentric?

Paracentric, does not involve a centromere, and cannot change the relative lengths of chromosome arm

Which results into Turner Syndrome?

Monopsony X

What is a human genetic disorder that results from a chromosomal recombination mutation that causes a deletion of a portion of chromosome 5

Lejeunes Syndrome

Sex chromosome nondisjunction example

Gene collar for coat is located on X chromosome

One of the two chromosomes is randomly inactivated in each cell, resulting in a tortoiseshell pattern if the cat has two different alleles for coat color

When does nondisjunction occur?

When homologous chromosomes or sister chromatids fail to separate during meiosis, resulting in an abnormal chrosmome number,