Topic 5-4 Dihybrid (2 Traits) Cross Practice

In mice, black is dominant over tan and long tails are dominant over short. Use B for black and b for tan. Use L for long and l for short. 1) Write the genotype for a hetero. black, hetero. long-tailed mouse.

• BbLl

• BBLL

• bbll

• Bbll

Tags

NGSS.HS-LS3-1

In mice, black is dominant over tan and long tails are dominant over short. Use B for black and b for tan. Cross two of these same individuals.

• BbLl x BbLl

• BBLL x bbll

• BbLL x bbLl

• Bbll x BBll

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In mice, black is dominant over tan and long tails are dominant over short. Use B for black and b for tan. From the Punnett Square, describe the phenotype of the offspring.

• 9/16: black, long tail 3/16: black, short tail 3/16: tan, long tail 1/16: tan, short tail

• 9/16: tan, long tail 3/16: black, short tail 3/16: black, long tail 1/16: tan, short tail

• 9/16: black, short tail 3/16: tan, long tail 3/16: black, long tail 1/16: tan, short tail

• 9/16: tan, short tail 3/16: black, long tail 3/16: tan, long tail 1/16: black, short tail

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In pea plant, tall height is dominant over short height and round shape is dominant over wrinkled. Use T for tall and t for short. Use R for round and r for wrinkled. 1) Write the genotype for a heterozygous tall, hetero. round pea plant.

• TtRr

• TTRR

• ttRR

• Ttrr

Tags

NGSS.HS-LS3-1

In pea plant, tall height is dominant over short height and round shape is dominant over wrinkled. Use T for tall and t for short. Use R for round and r for wrinkled. Cross two of these same individuals. ________________________ x ________________________

• TtRr x TtRr

• TTRR x ttrr

• TtRR x TTRr

• TtRr x TTRR

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In pea plant, tall height is dominant over short height and round shape is dominant over wrinkled. Use T for tall and t for short. Use R for round and r for wrinkled. From the Punnett Square, describe the phenotype of the offspring.

9/16:​ (a)  

3/16:​ (b)  

3/16:​ (c)  

1/16: ​ (d)  

• tall and round
• short and round
• tall and wrinkled
• short and wrinkled

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In humans, dimple is dominant over no dimple and freckle is dominant over no freckle. Use D for dimple and d for no dimple. Use F for freckle and f for no freckle. 1) Write the genotype for a heterozygous dimples and heterozygous freckles.

• DdFf

• DDFF

• ddff

• Ddff

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In humans, dimple is dominant over no dimple and freckle is dominant over no freckle. Use D for dimple and d for no dimple. Use F for freckle and f for no freckle. 2) Write the genotype for a person with no dimples and no freckles.

• ddff

• DdFf

• DDFF

• DdFF

Tags

NGSS.HS-LS3-1

Problem #3

In humans, dimple is dominant over no dimple and freckle is dominant over no freckle. Use D for dimple and d for no dimple. Use F for freckle and f for no freckle. From the Punnett Square, describe the phenotype of the offspring and write the fraction.

• 4/16 dimple, freckle; 4/16 dimple, no freckle; 4/16 no dimple, freckle; 4/16 no dimple, no freckle

• 8/16 dimple, freckle; 4/16 dimple, no freckle; 2/16 no dimple, freckle; 2/16 no dimple, no freckle

• 2/16 dimple, freckle; 6/16 dimple, no freckle; 6/16 no dimple, freckle; 2/16 no dimple, no freckle

• 1/16 dimple, freckle; 7/16 dimple, no freckle; 4/16 no dimple, freckle; 4/16 no dimple, no freckle

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In aliens, green hand is dominant over white hand and huge mouth is dominant over small mouth. Use G for green hand and g for white hand. Use H for huge mouth and h for small mouth. 1) Write the genotype for a hetero. green-hand, hetero huge-mouth alien.

• GgHh

• GGHH

• ggHh

• Gghh