apple seedlings
 

apple seedlings
 

Mihai Cartoaje schreef
A possible explanation of the lower quality of most hybrids is if bad
genes are recessive, so alleles (hope I'm using the word correctly) of
hybrids would contain two recessive bad genes.

Maybe the bad genes shall be weeded out by further selection.

+ + +
The other way about. A gene is a particular area of DNA with a certain
function. An allele is one of several possible variants of the gene, so
selection (natural or artificial) eliminates 'bad' alleles, not 'bad' genes.
You cannot select for genes, and if you manage to do so anyway there is a
fair chance you get a new species (as this would mean altering the scope of
the genome). BTW, it is very anthropocentric to speak of alleles being 'bad'
or 'good'. Mostly alleles just are, and are advantageous or not depending on
circumstance.

Of course, colloquially genes are referred to in the reverse of the true
situation. Hope this clarifies it,
PvR

If this is less than crystal clear, just use a book, any decent book!

apple seedlings
 

Mihai Cartoaje schreef
A possible explanation of the lower quality of most hybrids is if bad
genes are recessive, so alleles (hope I'm using the word correctly) of
hybrids would contain two recessive bad genes.

Maybe the bad genes shall be weeded out by further selection.

+ + +
The other way about. A gene is a particular area of DNA with a certain
function. An allele is one of several possible variants of the gene, so
selection (natural or artificial) eliminates 'bad' alleles, not 'bad' genes.
You cannot select for genes, and if you manage to do so anyway there is a
fair chance you get a new species (as this would mean altering the scope of
the genome). BTW, it is very anthropocentric to speak of alleles being 'bad'
or 'good'. Mostly alleles just are, and are advantageous or not depending on
circumstance.

Of course, colloquially genes are referred to in the reverse of the true
situation. Hope this clarifies it,
PvR

If this is less than crystal clear, just use a book, any decent book!

apple seedlings
 

I was counting on the 10 to 20 Celsius degrees of extra cold resistance
seedlings have. BRBR

Seedlings are not likely to have any more cold resistance than their parents.
Actually, for harsh climates, the usual practice is to graft the desirable
cultivar onto a very hardy rootstock. This is done with a wide variety of fruit
trees and ornamental plants.

Apple trees prefer sexual reproduction.

Did they tell you this? I assure you the apple tree does not care whether it is
a seedling, cutting, or graft, as long as it has enough water, sun, nutrients,
& favorable temperatures. The only difference is that a seedling will take ten
or 20 years to bear fruit, while a cutting or graft will start bearing very
quickly.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)

apple seedlings
 

apple seedlings
 

"P van Rijckevorsel" wrote in message .. .

The other way about. A gene is a particular area of DNA with a certain
function. An allele is one of several possible variants of the gene, so
selection (natural or artificial) eliminates 'bad' alleles, not 'bad' genes.

I have researched in a biology book. Two genes might be alleles, or
they might not be alleles.

apple seedlings
 

"P van Rijckevorsel" wrote in message .. .

The other way about. A gene is a particular area of DNA with a certain

Those are loci.

apple seedlings
 

Give this dude a cigar!!!
He actually read a book!!!!
Believe it or not, there's a lot more where that one came from.
The place is called a library. Check it out.


"Mihai Cartoaje" wrote in message
m...
"P van Rijckevorsel" wrote in message
.. .

The other way about. A gene is a particular area of DNA with a certain
function. An allele is one of several possible variants of the gene, so
selection (natural or artificial) eliminates 'bad' alleles, not 'bad'
genes.

I have researched in a biology book. Two genes might be alleles, or
they might not be alleles.

apple seedlings
 

Give this dude a cigar!!!
He actually read a book!!!!
Believe it or not, there's a lot more where that one came from.
The place is called a library. Check it out.


"Mihai Cartoaje" wrote in message
m...
"P van Rijckevorsel" wrote in message
.. .

The other way about. A gene is a particular area of DNA with a certain
function. An allele is one of several possible variants of the gene, so
selection (natural or artificial) eliminates 'bad' alleles, not 'bad'
genes.

I have researched in a biology book. Two genes might be alleles, or
they might not be alleles.

apple seedlings
 

"P van Rijckevorsel" wrote
The other way about. A gene is a particular area of DNA with a certain
function. An allele is one of several possible variants of the gene, so
selection (natural or artificial) eliminates 'bad' alleles, not 'bad'
genes.

Mihai Cartoaje schreef
I have researched in a biology book. Two genes might be alleles, or
they might not be alleles.

+ + +
No. You either have a bad book (not sure if they exist) or you read wrong.
Try a new book.
PvR

apple seedlings
 

"P van Rijckevorsel" wrote
The other way about. A gene is a particular area of DNA with a certain
function

Mihai Cartoaje schreef
Those are loci.

+ + +
No, a gene is a functional unit.
A locus is (as the word says) the place (of the gene) on a chromosome.
PvR

apple seedlings
 

"P van Rijckevorsel" wrote
The other way about. A gene is a particular area of DNA with a certain
function. An allele is one of several possible variants of the gene, so
selection (natural or artificial) eliminates 'bad' alleles, not 'bad'
genes.

Mihai Cartoaje schreef
I have researched in a biology book. Two genes might be alleles, or
they might not be alleles.

+ + +
No. You either have a bad book (not sure if they exist) or you read wrong.
Try a new book.
PvR

apple seedlings
 

"P van Rijckevorsel" wrote
The other way about. A gene is a particular area of DNA with a certain
function

Mihai Cartoaje schreef
Those are loci.

+ + +
No, a gene is a functional unit.
A locus is (as the word says) the place (of the gene) on a chromosome.
PvR

apple seedlings
 

"P van Rijckevorsel" wrote in message ...

No. You either have a bad book (not sure if they exist) or you read wrong.
Try a new book.

Solomon, Eldra Pearl, et al. Biology. 3rd edition. Sunders, Forth
Worth, 1993.

Page 233: "If genes occupy the same locus on each of a pair of
chromosomes, they are said to be alleles."

They use the expression "not allelic" otherwise. I understand "allele"
as "sister", except for genes.

apple seedlings
 

"P van Rijckevorsel" wrote in message ...

No. You either have a bad book (not sure if they exist) or you read wrong.
Try a new book.

Solomon, Eldra Pearl, et al. Biology. 3rd edition. Sunders, Forth
Worth, 1993.

Page 233: "If genes occupy the same locus on each of a pair of
chromosomes, they are said to be alleles."

They use the expression "not allelic" otherwise. I understand "allele"
as "sister", except for genes.