Inheritance Jeopardy

Categories: Five.

Daily Doubles: Three.

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DefinitionsMonohybridCross

DihybridCross

Codominance, IncompleteDominance

Pedigrees,Sex-Linkage

“GgHH” is an example of a _____, while “albino with hitchhiker’s thumb” is an

example of a _____.

What are genotype, phenotype?

The region of a chromosome that codes for one protein is called a

_____. A particular version of it is called an _____ and is usually

represented by one or more letters.

What are gene, allele?

With respect to the gene for antler length in moose (letter G), suppose that the dominant phenotype is long antlers, and the recessive phenotype

is short stunted antlers.With respect to the gene for coat pattern (letter P), the recessive

phenotype is a white chest spot, and the dominant phenotype is no spot.A moose with the genotype Ggpp

will have this phenotype.

What is: long antlers and no white chest spot?

A parent with the genotype AB is said to be _______.

What is heterozygous?

DAILY DOUBLE!Choose up to your current point total

to wager.

Win = plus wager x 2

Lose = subtract wager

Match Law with Illustrative Example:A. Law of DominanceB. Law of Segregation

C. Law of Independent Assortment

1. Because the genes for chin dimples and hitchhiker’s thumb are on different chromosomes,

these traits are not inherited together.2. A parent with the genotype YY will only produce

children with a dominant phenotype.3. A parent with the genotype UuTt produces

gametes with only one U/u allele and only one T/t allele.

What is A-2, B-3, C-1?

One cat carries heterozygous, long-haired traits (Ss), and its

mate carries homozygous short-haired traits (ss). This is the

probability of an offspring with short hair.

What is 50%?

One flower is heterozygous red (Rr) and it is crossed with a

homozygous white (rr) plant. This is the probability of red-

colored offspring.

What is 50%?

In dogs, there is an hereditary deafness caused by a recessive gene, “d.” A kennel owner has a

male dog that she wants to use for breeding purposes if possible. The dog can hear, so he

must be either DD or Dd. If the dog’s genotype is Dd, the owner doesn’t to use him as a long-

term breeder. To find out, she breeds him with a deaf female (dd). They have 10 puppies.

If the male was heterozygous, this many puppies will be deaf. If he was homozygous, this many

puppies will be deaf.

Heterozygous: 5.Homozygous: 0.

Two plants with a dominant phenotype are crossed. 25% of their offspring have a recessive

phenotype.Therefore, these must have been their genotypes. (Homozygous

dominant, homozygous recessive, or heterozygous)

What are heterozygous and heterozygous?

This is a cross showing a heterozygous male mated with a homozygous female.

A (1) aa Aa (3) aaa (2) Aa aa

The numbered boxes 1, 2, and 3 represent these three real-world cells

respectively.

What are a possible sperm, egg, and zygote?

What is the probability that the offspring of a cross of iikk x iiKK would have a dominant phenotype

for both genes?

What is 0%?

What is the probability that a cross of JJuu x jjUU would be

heterozygous for both genes (JjUu)?

What is 100%?

A heterozygous platypus with twisted claws and pink foot pads

mates with another platypus who is homozygous recessive for both

traits.What are their odds of having

twisted-clawed, pink-foot-padded baby platypii?

What is 25%?

Two black-eyed, orange-gilled fish are both heterozygous (BbGg).

What are their odds of having pale-eyed, pink-gilled offspring?

What is 1/16, or 6.25%?

DAILY DOUBLE!Choose up to your current point total

to wager.

Win = plus wager x 2

Lose = subtract wager

A farmer has a female goat that is homozygous recessive for both a thin

coat and stunted hooves (tthh).He wants offspring with thick coats and

normal hooves. He has his choice of males that are TThh, TtHh, or TtHH. Which male is most likely to produce

thick-coated, normal-hooved offspring, and what chance does he have?

What is the male with the genotype TtHH, and 50%?

A frog with striped feet mates with a frog with spotted feet, producing

babies whose feet have both stripes and spots. It’s an example of this

kind of inheritance pattern.

What is codominance?

Suppose koalas exhibit incomplete dominance with respect to nostril

color, and the letter N/n is used for the gene. If a black-nostrilled koala mates with a white-nostrilled koala,

what will be the phenotype and genotype of the offspring?

What are gray nostrils, and Nn?

If color is incompletely dominant, what are the odds that a red flower and an orange flower could have

yellow offspring?

What is 0%?

Recall that for blood type, A and B are codominant alleles while O is recessive to

both.In Mamma Mia, Sophie wants to know who her father is, but she could’ve saved herself

all that trouble. She has Type B blood, while her mother has Type A. Of her three possible fathers, Sam was Type O, Bill was type A, and Harry was type AB. Could any

of them be the right guy?

Yes, Harry.

Recall that for blood type, A and B are codominant alleles while O is recessive to both. And when it

comes to Rh factor, + is dominant to -.

What are the odds that an AB+- mother and an AO-- father would

have a child with B- blood?

What is 2/16, or 12.5%?

A woman who is XAXA has two children with a man who is XaY.

One is a daughter and the other is a son. What are the odds that at least one of the children has the recessive

phenotype?

What is 0%?

Suppose a gene is carried on the Y-chromosome. A woman marries a

man who has the dominant phenotype for this gene. What are

the odds that a daughter would have the dominant phenotype, and what

are the odds that a son would?

What are 0% and 100%?

If two blue-footed boobies with shiny feathers have five children, and one of them has dull feathers, are shiny feathers the dominant or recessive phenotype? (Making a

pedigree is recommended)

Shiny feathers are dominant.

Hemophilia is recessive and X-linked in humans. What are the odds that a hemophiliac father and carrier mother would have a hemophiliac

son?

What is 1/4?

DAILY DOUBLE!

Choose up to your current point total to wager.

Win = plus wager x 2

Lose = subtract wager

Complete genotypes for this pedigree, and give probability that person 1 is heterozygous. Remember

shaded = recessive phenotype. Use the letter R/r.

1

rr

rr

rr

RrRrRr

RrRr

RrRr

R?

R?

R?R?50%

chance of Rr

1