Question

As a research botantist, you are crossing different plants with the objective of producing polyploid offspring. After completing crosses from two different plant species, you determine the chromosome count in the offspring to determine if alloploids are obtained, or if autoploids are the result. Complete the table below to indicate chromosome counts in mothers, fathers, and offspring for the four successful crosses obtained. If necessary, indicate whether the offspring are autoploid or alloploid. For your answers, columns 1-3 expect integer numbers (not words), and column 4 expects the word autoploid or alloploid (spelling counts) Chromosomal count, Chromosome count, Chromosome count, mother 8 Type of polyploid father offspring 18 26 16 alloploid 6 10 24 autoploid 10 28 autoploid

Answer 1

QUESTION-1

ANSWER-

MOTHER	FATHER	OFFSPRING	TYPE OF POLYPLOID
8	18	26	Alloploid
10	6	16	Alloploid
12	10	24	Autoploid
10	14	28	Autoploid

In human, there are 23 homologous chromosome pairs. Out of them, 22 are autosomes while one pair is the sex chromosome.

Polyploidy is a condition when a cell contains more than two sets of chromosomes. Polyploidy arises due to the result of nondisjunction of chromosomes during mitosis or meiosis.

Polyploidy can be of two types

1. Autopolyploid
2. Allopolyploid

AUTOPOLYPLOID

Autopolyploidy can occur due to the abnormal cell division in mitosis.

Doubling of the same chromosome sets.

Autopolyploidy is derived from the single species.

ALLOPOLYPLOID

Allopolyploidy is another type of polyploidy condition that occurs due to the combination of genomes of different species such as in hybrid species.

Arise via hybridization between two species.

GOOD LUCK.