Types of Genetic Problems

In a simple monohybrid cross, like a heterozygous green crosses with a homozygous green, the genotypes for the offspring could be

• 25% GG, 25% Gg, and 50% gg

• 25% green and 75% yellow

• 50% GG and 50% Gg

• all green peas

Tags

NGSS.HS-LS3-1

In a simple monohybrid cross, like a heterozygous green crosses with a homozygous green, the phenotypes for the offspring could be

• 75% green and 25% yellow peas

• 50% green and 50% yellow

• all 100% green peas

• 50% GG and 50% Gg

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If two parents are heterozygous for being tall, then the parents genotypes are

• TT

• Tt

• tt

Tags

NGSS.HS-LS3-1

Monohybrid means that there is

• only one trait in the cross

• there are two traits in the cross

• there is a mixed of one type of plant

From the Dihybrid Problems, a heterozygous running, heterozygous black mouse would have the following genotype?

• Rr BB

• Rr Bb

• rr BB

• RR Bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The possible gametes for the heterozygous running, heterozygous black mouse parents could be which of the following (select all that apply- FOIL METHOD REMEMBER)

• RB

• Rb

• rB

• rb

• rr

Tags

NGSS.HS-LS3-1

Dihybrid Crosses helped Gregor Mendel develop the Law of ...?

• Law of Segregation

• Law of Probability

• Law of Independent Assortment

• No laws were developed

Cross a homozygous running homozygous black mouse with a heterozygous running, brown mouse. The parents genotypes are:

• RR BB X Rr bb

• Rr Bb X Rr bb

• RR BB X RR bb

• RR BB X Rr Bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Cross a homozygous running homozygous black mouse with a heterozygous running, brown mouse. The phenotypes of the offspring would be

• all waltzing and black mice

• all running and black mice

• all running and brown mice

• all waltzing and brown mice

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Incomplete Dominance: In some cats the gene for tail length shows incomplete dominance. Cats with long tails and cats with no tails are homozygous for their respective alleles. Cats with one long tail allele and one no tail allele have short tails.

Cross a long tail cat and a cat with no tail and determine the genotype for the offspring

• 100% long tails

• 100 % LN

• 100% short tails

• I have no idea

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2