[Magdalen] Sex determination (was something else)

[Lynn Ronkainen]

The fact that in the developing embryo, certain areas become one 'body part' 
or another depending on the chromosomal determination of female or male 
genetalia is fascinating and another reason that 'things can happen' that 
are apart from what we once would have said 'the ordinary'.

I still wish that there were more significant studies going on about 
hormones in food and in the environment, that may be affecting genetic 
sexual development and/or mutations.

Lynn

website: www.ichthysdesigns.com

When I stand before God at the end of my life I would hope that I have not a 
single bit of talent left and could say, "I used everything You gave me." 
attributed to Erma Bombeck
 "Either Freedom for all or stop talking about Freedom at all" from a talk 
by Richard Rohr

--------------------------------------------------
From: "cady soukup" <cadyasoukup at gmail.com>
Sent: Friday, May 06, 2016 12:33 PM
To: <magdalen at herberthouse.org>
Subject: Re: [Magdalen] Sex determination (was something else)

> Basically, no -
>
> There are genetically-based variants (xxy, xyy, etc.), genetic mosaics
> (more than one genetic expression of DNA in one individual), and many
> ways to express or not express the underlying genes (penetration,
> expression, other terms & conditions). That's what makes genetics
> interesting.
>
> The majority tends to be expressed normally. In the specifics, not true.
>
> I've met & known variants (xxy, xyy) who have expressed relatively
> normally. It's hard to know for sure unless you absolutely know an
> individual's genetics, physiology, and life expression.
>
> Cady
>
> On 5/6/16, Rick Mashburn <ricklmashburn at gmail.com> wrote:
>> I was horrible at science in school but isn't it really genetic? The 
>> fetus
>> is either xx or xy from conception, right? Wouldn't that control the
>> physical development?
>>
>> Peace, Rick
>> On May 6, 2016 8:32 AM, "James Handsfield" <jhandsfield at att.net> wrote:
>>
>>> There’s a difference between the genetics and the anatomical development
>>> of an embryo or fetus.  You are right that an embryo is male or female 
>>> in
>>> most cases.  Genetic confusion does occur, but it’s usually fatal long
>>> before term.
>>>
>>> The argument that an embryo or fetus becomes a different sex in
>>> development is also mistaken.  It’s based on the long discredited idea
>>> that
>>> ontogeny recapitulates phylogeny.  The anatomical sex differences are
>>> homologous in that they arise from the same embryonic structures.  There
>>> are two embryonic reproductive systems in mammals - the Malphigian 
>>> system
>>> and the Wolffian system.  The Malphigian system becomes dominant in 
>>> males
>>> and the Wolffian system in females, but both systems exist in both 
>>> sexes.
>>>
>>> Alleluia!  Christ is risen!
>>>
>>> James Handsfield
>>> jhandsfield at att.net
>>>
>>> > On May 6, 2016, at 4:02 AM, Sibyl Smirl <polycarpa3 at ckt.net> wrote:
>>> >
>>> > That's not the way that I learned it. At least, 99.9% of the time,
>>> there's an egg and a sperm.  The sperm contains either an x chromosome 
>>> or
>>> a
>>> y chromosome, not both.  The egg contains an x chromosome, one of two
>>> possibles (the mother has two matching ones, which divide to produce the
>>> egg.)  Conception occurs when the egg and the sperm meet: an X matches
>>> with
>>> a y, or with another x, so that if it happens to be a Y sperm, 
>>> conception
>>> results in an XY (male) combination, and if it's an X sperm, you get an
>>> XX
>>> combination (female).  So from the moment there's a fertilized egg, it's
>>> either a girl or a boy, even if it's only one or a few cells, and you
>>> can't
>>> yet tell by looking until much later, unless you want to kill it and 
>>> have
>>> an electron microscope handy.
>>>
>>>
>>
>