Test

In plants, tall is dominant to short. A heterozygous tall plant is crossed with homozygous tall plant.

Which choice below correctly identifies the parents in this cross?

Test

In the cross below, what are the genotypes of the parents?

Test - Move to quiz?

In cocker spaniels the allele for a black coat color (B) is dominant over the allele for a brown coat color (b).

If a homozygous recessive brown cocker spaniel is crossed with a heterozygous black cocker spaniel, which of the following genotypic ratios can be expected?

(Show your work to receive full credit)

Test

Tomato plants usually have hairy stems. Hairless stems are present in tomato plants that are homozygous recessive for that trait.

If the stem characteristics are determined by a single gene, what is the expected outcome of crossing two tomato plants that are heterozygous for hairy stems?

(Show your work to receive full credit)

Test

Albinism is an autosomal recessive condition.

Which circle graph shows the genotype probability when an albino female mates with a male that is heterozygous for the albinism trait?

(Show your work to receive full credit)

Test

In dogs, straight tails (S) are dominant to curly tails (s). Steven's dog has a curly recessive tail (ss).

The appearance of a recessive trait (curly tail) in an animal’s offspring most likely means that…

Test

In pigeons, no crest is dominant to crest.

What are the expected genotypes of the offspring if a homozygous no crest pigeon mates with a crest pigeon?

Test - similar to STAAR 2021 #41

Note: change pink flower to spotted

Some flower colors are determined by codominance. Possible genotypes and phenotypes of flowers are shown below.

Which table shows the expected phenotypes of offspring resulting from a cross between a white flower and a pink flower?

(YOU MUST SHOW YOUR WORK TO RECEIVE FULL CREDIT!!!)

Type # response:

This question for practice / Exit / Review?

-hooves for quiz

-2023 as is for test

In humans the allele for straight hairline (w) is recessive over the allele for widow's peak (W). The phenotypes for each trait are shown below in the picture.

What is the probability of straight hairline in the offspring of parents that are both heterozygous?

Test

The inheritance pattern for an autosomal dominant trait is shown in the pedigree. Shaded symbols represent individuals that express the dominant trait.

Based on this pedigree, what are the most likely genotypes of individuals I-1 and I-2?

Test

In humans blood type is determined by the A, B, and O alleles. The A and B alleles are codominant to each other and dominant over the O allele. An individual with the AO genotype and an individual with the BO genotype can produce offspring with which of the following phenotypes?

Test

NOTE: Make similar question for quiz

A model of the genetic control of coat color in rabbits is shown.

Which Punnett square represent a cross that would produce albino offspring?

STAAR 2022 #30

In domesticated dogs, hair type is controlled by two different alleles. The allele for wire hair is (H) and the allele for smooth hair is (h).

When two heterozygous dogs are crossed, what percentage of the offspring is expected to be homozygous for smooth hair?

Show your work.

Cut or move to practice? Would need rephrasing if used (not currently aligned)

The table below summarizes the phenotypes shown in the F2 generation of two species of butterflies.

Which statement is best supported by the phenotypes of the offspring in Species 1 and Species 2?

Original STAAR item we used to modify

Test

Note: add practice problems in packets/cfu

STAAR 2021 #25

A genetic cross involving two unlinked genes is represented.

AaGG x aaGg

Which genotype is NOT possible in the offspring produced by the cross?

Test

STAAR 2017 #29

In Holstein cattle the allele for black hair color (B) is dominant over the allele for red hair color (b), and the allele for polled (P), or lacking horns, is dominant over the allele for having horns (p).

What is the expected phenotypic ratio of the offspring of a BbPp × BbPp cross if these alleles sort independently?

Show your work.

QUIZ

A genetic cross involving one gene is represented below.

Ee X EE

Which genotype is NOT possible in the offspring produced by the cross?

(YOU MUST SHOW YOUR WORK TO RECEIVE FULL CREDIT!!!)

Use this modified version for quiz // original for test

Possible genotypes and phenotypes of angelfish are shown below.

Which table shows the expected phenotypes of offspring resulting from a silver angelfish and a heterozygous black angelfish?

(YOU MUST SHOW YOUR WORK TO RECEIVE FULL CREDIT!!!)

Quiz

Albinism (a) is a recessive condition. Normal pigmentation (A) is dominant. In order to have albinism you must have two recessive alleles.

Which circle graph shows the genotype probability when an albino female mates with a male that is homozygous dominant?

(YOU MUST SHOW YOUR WORK TO RECEIVE FULL CREDIT!!!)

Quiz

A baby with the recessive green eyes trait has two brown eyed parents.

Based on this information above, which of the following must be TRUE?

Quiz

In humans, tongue rolling is dominant. NOT being able to roll your tongue is recessive.

Juliet has one gene for being able to roll her tongue and one gene for not being able to roll her tongue.

When Juliet has children, which of the following will be TRUE?

Quiz

STAAR 2016 - #46

Chickens can have different types of feathers. Frizzled feathers curl toward a chicken’s head. Assume that feather type is determined by a single gene and that the allele for frizzled feathers is dominant over the allele for straight feathers. In a cross between two chickens with straight feathers, what percentage of the offspring can be expected to have frizzled feathers?

(YOU MUST SHOW YOUR WORK TO RECEIVE FULL CREDIT!!!)

Quiz

The inheritance pattern for hair color in a family is shown below.

Which child can ONLY have light hair color?

Test

Test

TEST

STAAR 2024 #5

TEST

2021 STAAR #41 - question stem and image modified from STAAR. Should we change it back to maintain the rigor of STAAR level questions?

Original STAAR question: Which table shows the expected phenotypes of offspring resulting from a cross between a black angelfish and a black-lace angelfish?

Dihybrid Quiz

Quiz

Keep but make ratio answers

Quiz

*Add pictures for agouti and albino

Quiz

Similar item already on test - could be used as is

Quiz

An unknown disease is a sex-linked recessive trait. Bella is worried that she might have the disease and goes to a genetic counselor to find out. The counselor tells Bella that her mom does not have the disease, her dad does, and that the disease is associated with the Y chromosome.

What is the probability that Bella has the disease?

Test

Muscular dystrophy is an x-linked recessive trait that causes the progressive weakening of the skeletal muscles. Unfortunately, mothers are responsible for passing this trait on to their sons. A mother who has muscular dystrophy marries a man who is normal.

What are the chances of this couple having a son who is affected?

Multiple alleles

Incomplete dominance

Codominance

Quiz

Cardi B is pregnant with her second child; however, she is unsure of who her baby daddy is this time. She has Type B blood (Get it?!?!?!). Her baby has Type O blood. Her list of potential baby daddies and their blood types are as follows: Drake is Type A, Travis Scott is Type B, Kendrick Lamar is Type AB, and J. Cole is Type O.

Which of the following could NOT be her baby daddy?

Exit Ticket - as is

If Matthew is heterozygous for freckles, what is his genotype?

Exit Ticket - as is

If Diego has no freckles, what is his genotype?

Quiz - change trait

If Emily is pure dominant, what is her genotype?