Genetics Review Quizizz

In Andalusian fowls, black individuals (BB) and white individuals (bb) are homozygous. Heterozygous individuals are grey (Bb). What is the genotype ratio for a cross between a grey fowl and a white fowl?

0 BB: 2 Bb: 2 b

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

0 BB: 2 Bb: 2 bb

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?

0%

How many PAIRS of sex chromosomes do humans have?

1

A sample of human DNA is made up of approximately 40% thymine. Based on this information, and the base pairing rules, approximately how much guanine is found in human DNA

10 Percent

Cross Two Homozygous plants (RRYY x rryy)R = round seeds, r = wrinkled seeds Y = yellow seeds, y = green seedsWhat percent will have Round and Yellow seeds?

100%

A roan cow shows co-dominance in fur color (orange and white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?

1: Orange: 2 Orange and White: 1 White

If a cancer cell divides, what is the result?

2 daughter cancer cells that continue to divide

In fruit flies, eye color is a sex linked trait. Red is dominant to white. What would be the percentages of offspring of a cross of a white eyed female with a red-eyed male?

2 female red eyes, 2 males white eyes

How many PAIRS of chromosomes do humans have?

23

A male beetle has the genotype Ttbb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype TtBb?

25%

Hemophilia is a x linked trait. A normal man marries a woman that is a carrier. What are their chances of having a child with the disorder?

25%

If several pea plants with the genotype TTYy are crossed with pea plants with the genotype Ttyy, what percentage of the offspring will be expected to have the TTYy allele combination?

25%

In the 1860s Gregor Mendel performed numerous dihybrid crosses between pea plants. Dihybrid crosses involve the study of the inheritance patterns related to two different traits. In guinea pigs the allele for black fur (B) is dominant over the allele for brown fur (b), and the allele for short fur (F) is dominant over the allele for long fur (f). What percentage of the offspring from a BbFf x bbff cross would be expected to be heterozygous for both traits?

25%

Long tongues (T) are dominant to short tongues in green tree frogs. What is the probability that two frogs that are heterozygous for long tongues could produce offspring with short tongues?

25%

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

25%

What percentage of the offspring will have this recessive disease?

25%

A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?

50 % BB and 50% Bb

What percentage of the female offspring will be a carrier for this recessive disease?

50%

If a woman is a carrier for a sex linked recessive trait of hemophilia and her husband has hemophilia, which of the following is true? Make a punnett square!

50% of daughters and 50% of sons have hemophilia

Facial dimples and free earlobes are both considered dominant human traits. What are the expected phenotypes of the offspring of a female with dimples and free earlobes (DDFf) and a male with no dimples and attached earlobes (ddff)?

50% with dimples and free earlobes and 50% with dimples and attached earlobes

How many degrees of freedom will be present, if using Chi-Square Test? Each day counts as an option or variable.

6

A vampire bat mom is homozygous dominant for red eyes (RR) and heterozygous for fluffy ears (Ff).The vampire bat father is homozygous recessive for black eyes (rr) and has fluffy ears.If some of the vampire bat babies have smooth ears, what percentage of babies will have the same eyes and ears as their mom?

75%

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

75% hairy stems: 25% hairless stems

Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?

75%tall and 25% short

What are the blood types of the possible children that a woman (type O) and man (type AB) can have?

A and B

Which of the following statements is true regarding blood types?

A and B are codominant, O is recessive.

What goes in box 1

AABb

What goes in box 6

AaBB

What goes in box 2

AaBb

Which of the following is a hybrid?

Bb

Which of the following is a phenotype?

Blue eyes

Which of the following is purebred?

Both AA and aa

A person who codes for a trait but it is not expressed is called

Carrier

Based on the Karyotype shown, at which chromosome pair can we identify a genetic disorder?

Chromosome pair 21

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

Co dominance

What pattern of inheritance is shown in this image?

Codominance

From a single fertilized ovum undergoing a series of rapid cell divisions, a human infant develops. The embryonic cells become specialized for a variety of functions. Which of these statements best describes how different cell types develop?

Each cell has an identical copy of DNA with enzymes controlling the expression of specific genes, leading to a variety of cells.

The color of labradors coats (Yellow, chocolate, or black) is due to _____, where one allele of one gene masks the phenotype of another GENE.

Epistasis

In humans, freckles (F) on the skin are dominant to no freckles (f). If two parents are heterozygous for the trait, which statement below best describes their chances of having a child with no freckles?

Every time they reproduce, the parents have one in four chance of having a child without freckles.

In human beings, which parent determines the sex of the offspring

Father

An individual with XX chromosomes would be ____________.

Female

Crossing-over between nonsister chromatids during meiosis is significant in heredity. This process most likely leads to an increase in which of the following

Genetic variation

What type of inheritance do two alleles have if their traits blend together?

Incomplete Dominance

What pattern of inheritance is shown in this image?

Incomplete dominance

What is the gender of the individual whose karyotype is seen in the image?

Male

All humans have at least one X gene. Choose the answer below that explains why all humans do NOT have a y gene

Males pass on a Y to male offspring and an X to female offspring

Sexual reproduction in animals depends on the production of gametes. Which of these processes produces gametes in animals?

Meiosis

Characteristics such as a widow's peak or attached earlobes are determined by the genetic code. Which components of DNA are referred to as the genetic code?

Nitrogenous bases

Snap dragon color is a incomplete dominant trait. A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr?

Pink

What are the possible genotypes for this cross?

TT = 25% Tt= 50% tt=25%

If global climate changed to no snow where the snowshoe hare lives, what will probably happen to the snowshoe hare's fur color in the winter (after several generations)?

The fur will be brown all year

The four butterflies in the illustrations represent the offspring in the generation. Which statement is best supported by the phenotypes of these offspring?

The generation is the result of a dihybrid cross.

The Himalayan rabbit's habitat has cold, snowy winters and mild summers. The body is typically covered in white fur except for the nose, feet, tail, and ears, which are covered in black fur. A scientist shaved an area of white fur on the back of a Himalayan rabbit and placed an ice pack over the shaved area. The shaved area grew black fur. Which of these best explains why the hair that grew back where the ice pack was placed was black and not white?

The genes for black hair were activated by specific temperatures.

In 1917 the biologist Thomas Hunt Morgan conducted studies in which he kept some caterpillars in the dark and placed some others under red, green, or blue lights. Exposure to red light produced butterflies with brightly colored wings. Exposure to green light resulted in dark-colored wings. Exposure to blue light or no light resulted in pale-colored wings. What was the most likely conclusion of Morgan's research?

The genes regulating wing color in butterflies are influenced by environmental factors.

A mutation that occurs in the gametes of an organism will most likely be transferred to which of the following?

The offspring of the organism.

Human bone, muscle, and nerve cells all contain the same number of chromosomes with the same complement of genes. What enables these cells to perform specialized activities?

The regulation of gene expression within each cell type

What is the chromosomal condition of the individual whose karyotype is seen in the image?

Trisomy 21 (Down's Syndrome)

True or False: Men can NEVER be "carriers" for recessive sex-linked traits because they only have one X chromosome.

True

The image shows the pattern of inheritance for colorblindness. From this diagram we can tell that colorblindness is

a sex-linked trait

W=white hairw= non-white hairIf you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair? none 1/2 3/4 all

all

What prenatal procedure extracts fluid from around the fetus to test for conditions such as down syndrome?

amniocentesis

A mass of abnormal cells that stay localized is called a :

benign tumor

The critical control point where top and go signals can regulate the cycle is called:

checkpoints

This type of inheritance pattern shows BOTH traits in possible offspring

co-dominance

AB blood type is an example of what type of inheritance?

codominance

What causes genetic variation in meiosis?

crossing over of chromosomes

Unlike mitosis, meiosis in male mammals results in the formation of

four haploid gametes

G = green, g = yellowThe genotype for a yellow plant is...

gg

the passing of genetic traits from parent to offspring.

heredity

having two different genes for a trait (sometimes called hybrid).

heterozygous

If this pedigree shows an autosomal recessive disorder, what MUST the genotype of individual II-3 be?

hh

having two of the same genes for the trait (sometimes called purebred).

homozygous

During meiosis, homologous chromosomes exchange genetic material. This exchange of genetic material —

increases the genetic variation

What gender is this individual?

male

A mass of abnormal cells that invade and impairs the functions of one or more organs is called a:

malignant tumor

When chromosomes fail to separate during meiosis it is referred to as ______________________, which can cause down syndrome and other genetic disorders.

nondisjunction

An offspring will receive how many alleles from each parent to determine a specific trait?

one

The range of human skin colors is caused by a variety of genes, each of which has at least 2 alleles. This is an example of:

polygenic inheritance

The process of crossing over occurs in what phase of meiosis?

prophase 1

An allele whose trait only shows up when no dominant allele is present.

recessive allele

Genotype refers to the ...

the possible combination of alleles in a gene

What happens if the control of the cell cycle is lost?

uncontrolled cell division