Nondisjunction & Chromosomal Mutations

The failure of one or more pairs of homologous chromosomes or sister chromatids to separate "normally" during meiosis is called _____________________.

• nondisjunction

• duplication

• deletion

• translocation

Tags

NGSS.HS-LS3-2

Nondisjunction

• When a segment of a chromosome breaks off.

• When a segment of a chromosome breaks off, flips, and reattaches.

• When a segment of a chromosome breaks and attaches to a non homologous chromosome.

• When entire chromosomes don't separate evenly during meiosis.

• When a segment of a chromosome is copied or doubles.

This Karyotytpe belongs to which syndrome?

• Turner Syndrome

• Edwards Syndrome

• Patau Syndrome

• Down Syndrome

• Klinefelter Syndrome

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Mark the signs or symptoms that correspond with Down Syndrome

• —Upward-slanting eyes with small folds of skin in the corners.

• — A large tongue

• —Clenched fists with overlapping fingers,

• —Deformed feet known as rocker-bottom feet

• —About half live to be 50 years of age.

Patau's syndrome and Edward's syndrome have the following signs and symptoms in common:

• —Heart defects

• —Microcephaly (small head)

• —Cleft palate (the hard palate or roof of the mouth is split)

• —Deformed feet known as rocker-bottom feet

Trysomy 21 is also called __________________________ Syndrome; while Trysomy 13 is also called __________________________ Syndrome and Trysomy 18 is also called _____________________________ Syndrome.

This karyotype belongs to which syndrome?

• Patau's Syndrome

• Edward's Syndrome

• Klinefelter Syndrome

• Down Syndrome

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

How many chromosomes does a person with trisomy 18 have?

• 46

• 22

• 47

• 23

How many chromosomes will a perons with Turner Syndrome have?

• 45

• 47

• 22

• 23

Non-disjunction involving the X chromosomes occurs during oogenesis and produces two kinds of eggs, XX and O (no X chromosomes). If normal sperms fertilize the two types of eggs, which are the possible genotypes produced?

• XX AND XY

• XYY AND XO

• XXY AND XO

• YY AND XO

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2