Advertisement Upgrade to remove ads

sex determination

Factors that control what sex an individual becomes

chromosomes

structure consisting of DNA and associated proteins that carries and transmits genetic information

hermaphroditism

the condition of possessing both male and female reproductive structures

monecious

having both male and female reproductive parts

dioecious

having either male or female reproductive parts

XX-XO sex determination

system in grasshoppers where females have two X chromosomes and males posses a single X chromosome

autosomes

chromosome that is the same in males and females, nonsex chromosomes

homogametic sex

the sex that produces gametes that are all alike with regard to sex chromosomes

XX-XY sex determination

system where females have two X chromosomes and males have a single X chromosome and a smaller Y chromosome

pseudoautosomal

small region of the X and Y chromosomes that contains homologous chromosomes

ZZ-ZW sex determination

system in birds, amphibians and fish where females are heterogametic and males are homogametic

genic sex determination

sex determination in which the sexual phenotype is specified by genes at one or more loci, but there are no obvious differences in the chromosomes of males and females

sequential hermaphroditism

A reproductive pattern in which an individual reverses its sex during its lifetime.

Turner syndrome

human condition in which cells contain a single X chromosome and no Y chromosome

Klinefelter syndrome

human condition in which cells contain one or more Y chromosomes along with multiple X chromosomes

triplo-X-syndrome

human condition in which cells contain three X chromosomes

sex-linked characteristic

characteristics determined by a gene or genes on sex chromosomes

hemizygous

possession of a single allele at a locus

nondisjunction

failure of homologous chromosomes or sister chromatids to separate in meiosis or mitosis

heterogametic sex

the sex that produces two types of gametes with respect to sex chromosomes

male-determining gene

SRY gene (sex-determining region Y)

dosage compensation

equalization in males and females of the amount of protein produced by X-linked genes

Lyon hypothesis

1 of the 2 X chromosomes in females becomes inactive (Barr body)

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set