Genetics Flashcards Lecture #4 and 5

Stages of Prophase 1

Leptotene, Zygotene, Pachytene, Diplotene, Diakinesis

Leptotene

Prophase Begins, chromosomes condense

Zygotene

Synapsis begins and the synaptonemal complex forms

Pachytene

Crossing over, DNA exchanged by non-sister chromatids

Diplotene

Synapsis ends, chiasma visible within bivalent

Diakinesis

Prophase ends, nuclear membrane disintegrates

Synapsis

Pairing of homologous chromosomes during prophase 1

Crossing over

Exchange of genetic material during synapsis

Centrosome

Microtubule-organizing center

Centriole

2 inside the centrosome

Centromere

Holds the two chromatids together

Kinetochore

Where spindles attach in mitosis

Chromsome

Made of 2 sister chromatids

Chromatid

1 half of a chromosome

Which of the following types of inheritance is characterized by an affected father who has all affected daughters but no affected sons?

X-Linked Dominant

Which of the following is not a characteristic of recessive sex-linked inheritance

Affected males can produce only affected sons

Binomial Theorem

P = N! / s!t! (p^sq^t)