Jeopardy InheritanceVocabularyInheritance IIWho’s the parent? Ratios Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy

If both parents are heterozygous for type B blood, what two blood types could their children have?

B and O (BB, BO, OO)

You cross a grey hen with a grey rooster. However, you end up with 10 grey chicks, 5 white chicks and 5 black chicks. What process best explains what happened?

Incomplete dominance

You have type AB blood and you need a transfusion. Which blood types can give you blood?

AB, A, B, O (all types)

Is it possible for an A blood Type parent and a B blood Type parent to have a child with O Blood Type? Explain

Yes, If both parents are Heterozygous (AO & BO) then there is a 25% chance to have a child with Type O Blood (OO)

You know that if you cross two purple flowers of a certain plant, you will get blue, red and purple flowers. What two colors should you cross to get the most purple flowers in the offspring?

Red and blue (all offspring will be purple)

If an individual’s genotype has two different alleles for the same trait, that organism is said to be what?

Heterozygous

In humans, what is the only chromosome pair that is not autosomal?

Pair 23 The sex chromosomes

If an individual has a genotype of DD, what two words best describe it? (be very specific)

Homozygous dominant

What do we call a family tree that uses a circle or a square for each family member?

Pedigree

What is the difference between codominance and incomplete dominance?

In codominance, both alleles are fully expressed (e.g. type AB blood). In incomplete dominance, the heterozygote exhibits a blend of both alleles (e.g. red and white flowers make pink).

What is a sex-linked trait?

A trait that is determined by a gene found on the sex (X) chromosome.

If a phenotypically normal woman has a colorblind girl, what phenotype does the father exhibit?

The father is colorblind.

The alleles for hemophilia, colorblindness and some types of muscular dystrophy are located on what chromosome?

The X Chromosome

What is the genotype for a girl that carries the gene for hemophilia, but doesn’t have the disorder?

X H X h Or X h X

Why are more males affected by X- linked disorders?

They only receive one copy of the X chromosome, so they can be affected by any dominant or recessive disorder. The Y chromosome doesn’t have the corresponding allele to cancel out any recessive trait on the X chromosome.

Blue eyes (b) are recessive to brown eyes (B) A dad and all three children have blue eyes. What genotype(s) could the mother be?

Bb or bb (B=brown, b=blue)

Freckles are dominant. If a woman without freckles has two children with freckles and three without, what genotype is the father?

He has freckles (Ff)

In a family, both children have type A blood. Their dad is type O. What blood types could the mother be?

Types A, AB (AA, AO, AB)

You breed two flowers that exhibit incomplete dominance with white and red. One of the parents has white flowers. The offspring are half white and half pink. What color was the other parent?

Pink (F W F R ) Or Pink (WR)

If a mom has hemophilia and all her children (both boys and girls) have hemophilia, what is the genotype of the father?

XhYXhY

Two plants that are heterozygous for the tall gene (Tt) are crossed. What is genotypic ratio of their children?

1TT : 2Tt : 1tt

In cats, long hair (L) is dominant over short hair (l). If you breed a homozygous dominant cat with a heterozygous cat, what phenotypic ratio would their children exhibit?

Phenotype = 4:0 All long haired Genotype =1LL : 1Ll (or 2LL:2Ll)

We breed two plants that are heterozygous for leaf shape. Round leaves (R) are dominant over oval leaves (r). What percentage of their offspring will have oval leaves?

25%

In rabbits, short ears(S) are dominant over long ears(s). We test cross a phenotypically normal rabbit with a homozygous recessive rabbit. If the genotype of the normal rabbit is Ss, what percentage of the offspring would we expect to be long-eared?

50%

In plants, round leaves (R) are dominant over oval leaves (r). Also, mottled leaves (M) are dominant over non-mottled leaves (m). Two plants that heterozygous for both traits (RrMm) are crossed. What is the phenotypic ratio for this cross?

9 round, mottled : 3 round, non-mottled : 3 oval, mottled : 1 oval, non-mottled

Final Jeopardy In some animals, black whiskers (B) are dominant over white whiskers (b). Draw a Punnett Square that meets the following phenotypical ratio: 3 black:1 white

Final Jeopardy Answer BBBb bb B B b b