Biology

Name two methods used in genetic prenatal diagnostic testing in humans.

Started by dakota nelson

Describe the maternal age effect associated with Down syndrome.

Started by tth

Recently, a gene located on chromosome 3 in humans, FHIT, has been shown to be associated with ________.

Started by nramada

Although the most frequent forms of Down syndrome are caused by a random error, nondisjunction of ...

Started by serike

Trisomy 21, or Down syndrome, occurs when there is a normal diploid chromosomal complement but one ...

Started by panfilo

Trisomy 21, or Down syndrome, occurs when there is a normal diploid chromosomal complement but one ...

Started by cool

The condition that exists when an organism gains or loses one or more chromosomes but not a complete ...

Started by humphriesbr@me.com

True or False: In Drosophila, the female is the heterogametic sex.

Started by tnt_battle

True or False: A typical XX human female has one Barr body.

Started by Kikoku

True or False: An individual with Klinefelter syndrome generally has one Barr body.

Started by vHAUNG6011

True or False: Sex-influenced genes cause males to be males and females to be females.

Started by jc611

True or False: Normally in humans, all the sons of a male showing a sex-linked phenotype will ...

Started by Sufayan.ah

In Drosophila, the sex of a fly with the karyotype XO:2A is ________.

Started by Haya94

Assuming a normal number of autosomes, what would be the sex of the following: XXY mouse, XXY Drosophila?

Started by bclement10

In Drosophila, an individual female fly was observed to be of the XXY chromosome complement (normal ...

Started by urbanoutfitters

In Drosophila, an individual female fly was observed to be of the XXY chromosome complement (normal ...

Started by nramada

Give the sex-chromosome constitution (X and Y chromosomes) and possible genotypes of offspring ...

Started by Redwolflake15

Dosage compensation in mammals typically involves the random inactivation of one of the two X ...

Started by javeds

What can cause phenotypic mosaicism for X-linked genes in female mammals?

Started by chads108

Dosage compensation leads to a variety of interesting coat color patterns in certain mammals. For ...

Started by bucstennis@aim.com

A color-blind, chromatin-positive male child (one Barr body) has a maternal grandfather who was ...

Started by FButt

Describe an experiment in which transgenic mice were used to identify the male-determining region of ...

Started by rosent76

How many chromosomes do Klinefelter and Turner syndromes have, respectively?

Started by lbcchick

A color-blind woman with Turner syndrome (XO) has a father who is color-blind. Given that the gene ...

Started by maychende

A small part of the human Y chromosome contains the gene that is responsible for determining ...

Started by genevieve1028