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Biology-Related Homework Help Genetics and Developmental Biology Topic started by: adrii01 on Dec 2, 2013



Title: In some mutant maize plants, KN1 is expressed at high levels in leaves.
Post by: adrii01 on Dec 2, 2013
As with all multicellular organisms, homeotic genes in plants control morphogenesis (how the tissues and organs of the plant are arranged).
   
   In maize plants, the homeotic gene KNOTTED1 (abbreviated KN1) helps maintain the indeterminate state of shoot apical meristems.
In wild-type maize plants, KN1 is expressed at high levels in the shoot apical meristem, but is expressed at low levels in leaves.

   In some mutant maize plants, KN1 is expressed at high levels in leaves. In those plants, outgrowths or knots of adventitious shoot meristems (shoot meristems that appear in abnormal locations on the leaves) form.

Use this information to determine which of the following statements are true.

Select the four statements that are true.

1. In wild-type maize plants, the KN1 gene is mostly expressed in shoot apical meristem cells.
2. Both the wild-type and mutant maize leaves have the same morphology.
3. Expression of the KN1 gene in shoot apical meristem cells produces a protein involved in the maintenance of shoot apical meristems.
4. In wild-type maize plants, the KN1 gene is expressed differentially in shoot apical meristem cells and leaf cells.
5. Leaves of the mutant maize plants produce more KN1 protein than leaves of wild-type maize plants.
6. In wild-type maize plants, the KN1 gene is present in shoot apical meristem cells, but not in leaf cells.
7. In mutant maize leaves, the KN1 gene is mostly not expressed.


Title: In some mutant maize plants, KN1 is expressed at high levels in leaves.
Post by: padre on Dec 15, 2013
HI adrii01

I totally missed your thread. What did you end up discovering here. Mind sharing your answer?

Sorry about that.


Title: In some mutant maize plants, KN1 is expressed at high levels in leaves.
Post by: oleviski on Jan 27, 2014
Maybe it's a little late, but I found the following to be true:

   Leaves of the mutant maize plants produce more KN1 protein than leaves of wild-type maize plants.
    Expression of the KN1 gene in shoot apical meristem cells produces a protein involved in the maintenance of shoot apical meristems.
    In wild-type maize plants, the KN1 gene is mostly expressed in shoot apical meristem cells.
   In wild-type maize plants, the KN1 gene is expressed differentially in shoot apical meristem cells and leaf cells.


Title: In some mutant maize plants, KN1 is expressed at high levels in leaves.
Post by: cboeke on Apr 23, 2014

Maybe it's a little late, but I found the following to be true:

   Leaves of the mutant maize plants produce more KN1 protein than leaves of wild-type maize plants.
    Expression of the KN1 gene in shoot apical meristem cells produces a protein involved in the maintenance of shoot apical meristems.
    In wild-type maize plants, the KN1 gene is mostly expressed in shoot apical meristem cells.
   In wild-type maize plants, the KN1 gene is expressed differentially in shoot apical meristem cells and leaf cells.
Not correct :(


Title: In some mutant maize plants, KN1 is expressed at high levels in leaves.
Post by: Adrianne92 on Apr 23, 2014

Maybe it's a little late, but I found the following to be true:

   Leaves of the mutant maize plants produce more KN1 protein than leaves of wild-type maize plants.
    Expression of the KN1 gene in shoot apical meristem cells produces a protein involved in the maintenance of shoot apical meristems.
    In wild-type maize plants, the KN1 gene is mostly expressed in shoot apical meristem cells.
   In wild-type maize plants, the KN1 gene is expressed differentially in shoot apical meristem cells and leaf cells.
Not correct :(

Did you figure out what it was??


Title: In some mutant maize plants, KN1 is expressed at high levels in leaves.
Post by: lenny49 on Apr 24, 2014
In wild-type maize plants, the KN1 gene is mostly expressed in shoot apical meristem cells.

Expression of the KN1 gene in shoot apical meristem cells produces a protein involved in the maintenance of shoot apical meristems.

Leaves of the mutant maize plants produce more KN1 protein than leaves of wild-type maize plants.

In wild-type maize plants, the KN1 gene is expressed differentially in shoot apical meristem cells and leaf cells.

^^Correct answers


Title: In some mutant maize plants, KN1 is expressed at high levels in leaves.
Post by: mavalen on Apr 24, 2014
Maybe it's a little late, but I found the following to be true:

   Leaves of the mutant maize plants produce more KN1 protein than leaves of wild-type maize plants.
    Expression of the KN1 gene in shoot apical meristem cells produces a protein involved in the maintenance of shoot apical meristems.
    In wild-type maize plants, the KN1 gene is mostly expressed in shoot apical meristem cells.
   In wild-type maize plants, the KN1 gene is expressed differentially in shoot apical meristem cells and leaf cells.

I also found these to be correct.


Title: In some mutant maize plants, KN1 is expressed at high levels in leaves.
Post by: mcolon on Apr 27, 2014
These are correct on mastering Biology.


Title: In some mutant maize plants, KN1 is expressed at high levels in leaves.
Post by: Nope26 on Jun 8, 2014
Oleviski is correct. Thank you.