5.2 chromosomes

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• Leerjaar 2

5.2 what are the chances

Chromosomes

= 1 long DNA molecule rolled up in between proteins 

46 chromosomes in every nucleus

Chromosome portret

• 44 autosomes =                        normale chromosomen (dus geen geslachtschromosomen)
• chromosomen paar zijn 2 homologe chromosomen = chromosomen van een paar die gelijk van vorm en lengte zijn
• 2 geslachtschromosomen
• BINAS 70B

autosomes and sex chromosomes

male and female

male:    2x 22 autosomes + X + Y = 46 chromosomes

female: 2x 22 autosomes + X + X = 46 chromosomes

egg cell and sperm cell

egg cell contains 22 autosomes + X chromsome

sperm cell contains 22 autosomes + X or 22 autosomes + Y

Variation

How many chromosome pairs does Chamaecrista fasciculata have?

(see picture)

1. 8
2. 3
3. 16
4. 20

A fruit fly has short wings and cannot fly. This is because of a mutation in chromosome number 2. Are the short wings part of the fly's genotype? And phenotype?

1. Only genotype
2. Only phenotype
3. Part of neither genotype or phenotype
4. Part of both genotype and phenotype

homework

study 5.2

do excercises 6 till 8