Free Printable 3. Amoeba Sisters Dihybrid Crosses

1.

H represents the allele for hairy, and h represents the allele for hairless. S represents the allele for sink liker, and s represents the allele for sink disliker. Cross a hairy male cat that dislikes sinks (Hhss) with a hairless female cat that likes sinks (hhSs). What are the possible allele combinations that could appear in the gametes of the male cat?

a)

HS Hs hS hs

b)

Hs hs

c)

HS Hs

d)

hS hs

2.

H represents the allele for hairy, and h represents the allele for hairless. S represents the allele for sink liker, and s represents the allele for sink disliker. Cross a hairy male cat that dislikes sinks (Hhss) with a hairless female cat that likes sinks (hhSs). What are the possible allele combinations that could appear in the gametes of the female cat?

a)

HS Hs hS hs

b)

HS hs

c)

Hs hs

d)

hS hs

3.

H represents the allele for hairy, and h represents the allele for hairless. S represents the allele for sink liker, and s represents the allele for sink disliker. Cross a hairy male cat that dislikes sinks (Hhss) with a hairless female cat that likes sinks (hhSs). What is the genotypic ratio of this cross?

a)

4 HhSs: 4 Hhss: 4 hhSs: 4 hhss

b)

8 HhSs: 8 hhss

c)

2 HHSs: 6 HHss: 6 hhSS: 2 hhSs

d)

1 hairy sink liker : 1 hairy sink disliker : 1 hairless sink liker : 1 hairless sink disliker

4.

Genotypic ratios and phenotypic ratios are always the same?

a)

True

b)

False

5.

H represents the allele for hairy, and h represents the allele for hairless. S represents the allele for sink liker, and s represents the allele for sink disliker. Cross a hairy male cat that dislikes sinks (Hhss) with a hairless female cat that likes sinks (hhSs). What are the chances of these two cats having an offspring that is a hairy sink liker?

a)

0%

b)

25%

c)

50%

d)

100%

3. Amoeba Sisters Dihybrid Crosses

Total questions: 5

Worksheet time: 3mins

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