Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?

50% Pp (purple); 50% pp (white)

75% Pp (purple); 25% pp (white)

25% PP, 50% Pp, 25% pp 75% purple, 25% white

B = brown eyes b = blue eyes What is true about these two brothers that have brown eyes? One has genotype BB the other Bb.

they have same phenotype but different genotypes

they have same phenotype and genotype

they have different genotypes and phenotypes

they have same genotype but different phenotypes

In garden peas, round peas are dominant to wrinkled peas. If you crossed a heterozygous round pea and homozygous recessive what would be the genotype and phenotype of the offspring?

50%Rr & 50%rr (genotype) and 50%Round & 50%Wrinkled (phenotype)

50%Rr & 50%Rr (genotype) and 100%Round (phenotype)

100%RR & 100%RR (genotype) and 100%Round (phenotype)

100%rr & 100%rr (genotype) and 100%Wrinkled (phenotype)

In tomatoes, red fruit (R) is dominant over yellow fruit (r). A plant that is homozygous for red fruit is crossed with a plant that has yellow fruit. What would be the genotypes and phenotypes of the OFFSPRING?

100%Rr (genotype) and 100%Red fruit (phenotype)

100%RR (genotype) and 100%Red fruit (phenotype)

100%rr (genotype) and 100%Yellow fruit (phenotype)

50%RR & 50%rr (genotype) and 50%Red & 50%Yellow fruit (phenotype)

A Tall plant (T) is dominant to short plant (t). If all offspring of a cross are heterozygous, what were the genotypes of the parents?

TT & tt (genotype) and one parent Tall & one parent Short (phenotype)

TT & TT (genotype) and parents are Tall (phenotype)

tt & tt (genotype) and parents are Short (phenotype)

Tt & Tt (genotype) and parents are Tall (phenotype)

A partial Punnett square is shown in the image. Given the offspring in the Punnett Square, what is the most likely genotype of the parents?

One parent is homozygous dominant and the other parent is heterozygous.

Both parents are homozygous dominant.

One parent is homozygous recessive and the other parent is heterozygous.

According to Mendel’s law of segregation, which of the following statements describes what happens to the alleles of a gene pair?

The alleles are separated during gamete formation.

The alleles are moved to different chromosomes.

The alleles are separated during fertilization.

MonoHybrid Cross Practice

Authored by Candace Henderson

Biology

9th Grade

32 Questions

NGSS covered

Used 252+ times

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MULTIPLE CHOICE QUESTION

15 mins • 1 pt

A homozygous dominant round seeded plant is crossed with a homozygous recessive wrinkled seeded plant. What are the genotypes of the parents?

RR X rr

Rr X rr

rr X rr

RR X Rr

Tags

NGSS.HS-LS3-1

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

In labrador retrievers the allele for a black coat color (B) is dominant over the allele for a brown coat color (b). If a brown labrador retriever is crossed with a heterozygous black labrador retriever, which of the following genotypic ratios can be expected?

0 BB: 2 Bb: 2 bb

1 BB: 2 Bb: 1 bb

2 BB: 0 Bb: 2 bb

2 BB: 1 Bb: 0 bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How many alleles (letters) does a child get from each parent for each trait?

Tags

NGSS.HS-LS3-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Dominant alleles are represented by a:

Male gene

lowercase letter

recessive trait

capital letter

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Aa, DD, bB, yy are all examples of

genotypes

phenotypes

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

T - tall and t = short
In the punnett square below, what belongs in the missing square

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

AA and Aa always show up as

dominant

recessive

Tags

NGSS.HS-LS3-1

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MonoHybrid Cross Practice

A homozygous dominant round seeded plant is crossed with a homozygous recessive wrinkled seeded plant. What are the genotypes of the parents?

In labrador retrievers the allele for a black coat color (B) is dominant over the allele for a brown coat color (b). If a brown labrador retriever is crossed with a heterozygous black labrador retriever, which of the following genotypic ratios can be expected?