Sex Determination in Plants

What is Sex determination? How can we determine the sex in Plants?

Expert Solution

Sex determination in plants:

Most angiosperms are hermaphrodite, flowers contain both male and female organs.
However, in some species male and female flowers are borne on separate plants (dioecious).
One plant genus in which the chromosomal basis of se determination has been worked out is Melandrium (Campion).
Here the ratio of X Y chromosomes is the important factor in determining whether plants produce male or female flowers.
This implies that genes on both of the sex chromosomes interact to produce the sex phenotype.
Studies of plants that had radiation-induced deletions in X or Y chromosomes showed that the Y chromosome contains regions that repress female development and induce male development, whereas the X chromosome has regions that stimulate development of female flowers.

Sex Determination:

The sex-determination system is a biological system which determines the development of sexual characteristics in an organism

Suhasini Buddi answered 3 years ago

Sex Determination in humans

What is Sex determination? How can we determine the sex in humans?

Compare and contrast the three methods of sex determination.

Besides the XY system, are there other sex determination systems?

Environmental factors such as exogenous hormones and temperature-dependent sex determination can cause sex ratios to diverge...

Environmental factors such as exogenous hormones and temperature-dependent sex determination can cause sex ratios to diverge from 1:1. Research a scenario that causes a sex ratio to diverge from 1:1?

Please answer both the parts of the answer. Sex determination in Drosophila is determined by the...

Please answer both the parts of the answer. Sex determination in Drosophila is determined by the ratio of X chromosomes to autosomes (X to A ratio) and relies on the cascade of alternatively spliced factors, some of which are themselves regulators of alternative splicing. The splicing regulator Sxl resides at the top of this cascade. Whether active Sxl protein will be present or not is determined by the X to A ratio of an organism. If the ratio of X...

Developmental Biology class: Compare and Contrast Sex Determination in Mammals to that of Drosophila

What different transcription factors take on different functional forms in sex determination of fruit flies?

Sex determination in Mammals. You have identified a gene that you have named “mont1” (for ‘make...

Sex determination in Mammals. You have identified a gene that you have named “mont1” (for ‘make ovaries not testes’) that is expressed at the time when the bipotential gonad becomes specified to become an ovary. Because of this “show it” evidence that mont1 is expressed in the right place at the right time, you hypothesize that mont1 is a critical regulator of the female primary sex determination pathway to specify ovary development. From what you know about the primary sex...

1) Name two species with non-genetic sex determination and describe the effective mechanism 2) Describe the...

1) Name two species with non-genetic sex determination and describe the effective mechanism 2) Describe the key evolutionary transitions that emerged as sexual organisms transitioned fromunimorphic to dimorphic and how this led to sexual selection. Explain with examples from readings and articles mentioned in class. please can you explain in both in about 3-4 paragraphs so I could understand more clearer.

1. Describe how normal sex determination occurs in humans from fertilization to puberty; include in your...

1. Describe how normal sex determination occurs in humans from fertilization to puberty; include in your discussion the role that chromosomes, hormones and gonads play in this process. 2. Describe 2 ways in which this process can be altered due to abnormalities. Describe each abnormality and the result in the offspring.

Question