© Boardworks Ltd 20091 of 3. 2 of 3© Boardworks Ltd 2009 What are sex chromosomes? Humans cells...

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Page 1: © Boardworks Ltd 20091 of 3. 2 of 3© Boardworks Ltd 2009 What are sex chromosomes? Humans cells contain one pair of sex chromosomes, which control gender.

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Page 2: © Boardworks Ltd 20091 of 3. 2 of 3© Boardworks Ltd 2009 What are sex chromosomes? Humans cells contain one pair of sex chromosomes, which control gender.

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What are sex chromosomes?

Humans cells contain one pair of sex chromosomes, which control gender.

Males have one X andone Y chromosome (XY).

Y chromosomes are very small and contain 78 genes, whereasX chromosomes are larger and contain 900–1,200 genes.

Because females can only produce X gametes, it is the sperm that determine the sex of the offspring at fertilization.

X chromosome

Y chromosome

Females have two X chromosomes (XX).

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Boy or girl?


Contents · Humans have 46 chromosomes (23 pairs). There are 22 pairs of autosomes (chromosomes which do not determine a person’s sex) and the sex chromosomes are called the X and

Contents · Humans have 46 chromosomes (23 pairs). There are 22 pairs of autosomes (chromosomes which do not determine a person’s sex) and the sex chromosomes are called the X and

Main Genetic Disorders Involving the Ear€¦ · The human being has 46 chromosomes, 22 pairs of non-sex chromosomes, known as autosomes and one pair of sex chromosomes (XX in women

Main Genetic Disorders Involving the Ear€¦ · The human being has 46 chromosomes, 22 pairs of non-sex chromosomes, known as autosomes and one pair of sex chromosomes (XX in women

Types of Chromosomes a. Autosomes Any chromosome that is not a sex chromosome. 1 to 22 b. Sex Chromosomes A chromosome involved with determining the sex.

Types of Chromosomes a. Autosomes Any chromosome that is not a sex chromosome. 1 to 22 b. Sex Chromosomes A chromosome involved with determining the sex.

Inheritance Patterns and Human Genetics. Sex Chromosomes and Autosomes Sex Chromosomes contain genes that determine the gender of an individual. Many.

Inheritance Patterns and Human Genetics. Sex Chromosomes and Autosomes Sex Chromosomes contain genes that determine the gender of an individual. Many.

Ks4 chromosomes, genes and dna (boardworks)

Ks4 chromosomes, genes and dna (boardworks)

Sex Linked Genes - ohio.k12.ky.us · Sex Linked Genes The Xs and Ys of Genetics . Sex Linked Genes • There are 23 pairs of chromosomes and one of those pairs are the sex chromosomes.

Sex Linked Genes - ohio.k12.ky.us · Sex Linked Genes The Xs and Ys of Genetics . Sex Linked Genes • There are 23 pairs of chromosomes and one of those pairs are the sex chromosomes.

Sex Chromosomes and Linked Genes A normal human cell (autosome) contains 46 chromosomes. 22 pairs of regular chromosomes and one pair of sex chromosomes.

Sex Chromosomes and Linked Genes A normal human cell (autosome) contains 46 chromosomes. 22 pairs of regular chromosomes and one pair of sex chromosomes.

Sex Chromosomes

Sex Chromosomes

Trojan Sex Chromosomes - United States Fish and Wildlife ...Trojan Sex Chromosomes . Exotic Introductions Problematic • Relatively few . practical. and . effective . alternatives

Trojan Sex Chromosomes - United States Fish and Wildlife ...Trojan Sex Chromosomes . Exotic Introductions Problematic • Relatively few . practical. and . effective . alternatives

© Boardworks Ltd 2004 Chromosomes, Genes and DNA KS4 Biology.

© Boardworks Ltd 2004 Chromosomes, Genes and DNA KS4 Biology.

1 2 Karyotypes 3 Mutations 4 Chromosomes & Sex.

1 2 Karyotypes 3 Mutations 4 Chromosomes & Sex.

Human Heredity. Human Chromosomes Humans have 46 total chromosomes Two Categories –Autosomes- first 22 pairs –Sex Chromosomes- 23rd pair, determine sex.

Human Heredity. Human Chromosomes Humans have 46 total chromosomes Two Categories –Autosomes- first 22 pairs –Sex Chromosomes- 23rd pair, determine sex.

Unit 4--Genetics Chapter 14 Human Heredity. 1) Autosomes –all the chromosomes except the sex chromosomes (in humans, there are 22 pair) 2) Sex chromosomes.

Unit 4--Genetics Chapter 14 Human Heredity. 1) Autosomes –all the chromosomes except the sex chromosomes (in humans, there are 22 pair) 2) Sex chromosomes.

Modern Genetics. Your note outline 1- Morgan and Drosophila 1- Morgan and Drosophila 2- Sex determination and chromosomes 2- Sex determination and chromosomes.

Modern Genetics. Your note outline 1- Morgan and Drosophila 1- Morgan and Drosophila 2- Sex determination and chromosomes 2- Sex determination and chromosomes.

SEX-LINKED TRAITS. Karyotype: a picture of chromosomes.

SEX-LINKED TRAITS. Karyotype: a picture of chromosomes.

SEX DETERMINATION from these studies concluded that genes are on chromosomes and specialized chromosomes determine sex.

SEX DETERMINATION from these studies concluded that genes are on chromosomes and specialized chromosomes determine sex.

The sex chromosomes and their abnormalities

The sex chromosomes and their abnormalities

Genetics Spring 2015 Chromosomes and Sex-Chromosomes Inheritance I.

Genetics Spring 2015 Chromosomes and Sex-Chromosomes Inheritance I.

SECTION CHROMOSOMES AND MEIOSIS 6.1 Study Guidemrjsbiologyclass.weebly.com/uploads/1/1/3/5/11355889/_bio_urb_ch06… · 6.1 CHROMOSOMES AND MEIOSIS ... chromosomes are sex chromosomes,

SECTION CHROMOSOMES AND MEIOSIS 6.1 Study Guidemrjsbiologyclass.weebly.com/uploads/1/1/3/5/11355889/_bio_urb_ch06… · 6.1 CHROMOSOMES AND MEIOSIS ... chromosomes are sex chromosomes,

Sex Chromosomes... ‘X’ and ‘Y’ chromosomes that determine the sex of an individual in many organisms, Females: XX Males: XY.

Sex Chromosomes... ‘X’ and ‘Y’ chromosomes that determine the sex of an individual in many organisms, Females: XX Males: XY.