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GENETICS Practice Chapter 11. G g. The parents in this cross are _____________ Homozygous Heterozygous. Heterozygous. G g. If G is dominant for green pods and g is recessive for yellow pods, what percentage of the offspring will have green pods? _______% . 75.

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GENETICS Practice Chapter 11

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Genetics practice chapter 11 l.jpg

GENETICS PracticeChapter 11


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G g

The parents in this cross are _____________

Homozygous Heterozygous

Heterozygous

G

g

If G is dominant for green pods and g is recessive for yellow pods, what percentage of the offspring will have green pods? _______%

75


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The genotype of the offspring in the blue box is _______

bb

The offspring in the blue box is

homozygous heterozygous

homozygous


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In guinea pigs black fur (B) is dominant over brown fur (b). The Punnett square for a cross between a HETEROZYGOUS black guinea pig and a PURE brown guinea pig would look like

This is the

Correct setup

Heterozygous = Bb

Pure brown = bb

homozygous

Another name for pure is _________________


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The alleles for blood type show 2 kinds of inheritance..

The following statements are TRUE or FALSE?

F A & B are codominant

A is dominant over B.

O is dominant over A.

A is dominant over O.

B and A are co-dominant

A is incompletely dominant over O.

O is recessive to A and to B

F O is recessive to both A & B

T

T

F

T


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X y

An organism has the genotype Xy.

What are the possible sperm it can produce?

____________

THINK ABOUT IT:

If females have an XX genotype and can only give X genes, which parent is the one that determines whether the baby is a boy or girl?

Father ;

The mother always gives an X

If the father gives a y, it’s a boy.

If the father gives an X; it’s a girl.


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If you cross a homozygous RED flowered four o’clock plant with a homozygous WHITE flowered plant, ALL of the offspring produced have PINK flowers.

This type of inheritance in which the heterozygote (Rr) shows a blending of traits is called __________.

A. Dominant/recessive inheritance

B. Co-dominance

C. Incomplete dominance

Incomplete dominance


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  • R r

  • r

  • r

  • Red throats (R) are dominant over white (r)

    throats in Goonie birds.

    Make a cross between a PURE RECESSIVE and a HETEROZYGOUS Goonie bird.

    Rr rr

    Rr rr

    What are the possible phenotypes of their offspring?

    (% and color)

    50% red throats

    50% white throats


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    B b

    B

    b

    Black eyes (B) are dominant over red eyes (b) in rats.

    Make a cross between two HETEROZYGOUS rats.

    BB Bb

    Bb bb

    What are the possible phenotypes of their offspring?

    (% and color)

    75 % black eyes

    25% red eyes


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    The parents in this cross are _____________

    Homozygous Heterozygous

    Homozygous

    If W is dominant for long wings and w is recessive for short wings, what percentage of these offspring will have short wings? _______%

    0% only ww makes it short


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    Gregor Mendel

    Who is the “Father of Genetics”?

    Which of the following genotypes could be from a HETEROZYGOUS organism?

    TT Rr Ww bb XX Ss

    RrWwSs


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    What kind of cross is this?

    Pure dominant X pure recessive

    Heterozygous X heterozygous

    Heterozygous X homozygous

    Hybrid recessive X hybrid pure

    Heterozygous X Homozygous

    hybrid

    Another name for heterozygous is _______________


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    In Reebops curly tails (T) are dominant over straight tails (t).

    Make a cross between a HOMOZYGOUS DOMINANT and a HOMOZYGOUS RECESSIVE Reebop.

    T T

    t

    t

    Tt Tt

    Tt Tt

    What is the probability the offspring will have straight tails?

    0%

    All will be Curly tailed (Tt)


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    What type of gametes can this organism produce?

    BbTt

    ______ ______ _______ _______

    BT bt bT Bt

    What type of gametes can this organism produce?

    BBTT

    ______ ______ _______ _______

    BT BT BT BT


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    TtRr X TtRr

    TTRR TTRr TtRR TtRr

    TTRr TTrr TtRr Ttrr

    TtRR TtRr ttRR ttRr

    TtRr Ttrr ttRr ttrr

    Tall = T short = t R= round r=wrinkled

    seeds seeds


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    9:3:3:1

    This is an example of a DIHYBRID cross.

    Which pattern of phenotypes will be seen in the offspring?

    How many offspring will be

    Short AND Round? ______

    Short AND wrinkled? ______

    3/16

    Recessive and dominant

    1/16

    Recessive and recessive

    HINT:9- dominant for both3- recessive and dominant

    3- dominant and recessive

    1- recessive and recessive


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    F2

    What do we call the offspring of the F1 generation?

    Which of the following genotypes could be from a HOMOZYGOUS RECESSIVE organism?

    TT bbRr Ww tt XX aa

    bb tt aa


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    The genotype of the offspring in the blue box is _______

    homozygous heterozygous

    heterozygous

    How many of the offspring from this cross will show the dominant characteristic?

    ¾ (75%) – AA and Aa


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    G is dominant for green pods.

    g is recessive for yellow pods.

    What is the genotype of the offspring in the shaded box?

    Gg

    What is the phenotype of the offspring in the shaded box?

    Green pods


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    T

    Which of the following is NOT TRUE?

    Genotype determines phenotype

    Alleles are different forms of the same gene.

    Genotype is the way the genes

    make you look.

    Organisms with different genotypes can have the same phenotype.

    T

    F

    T

    Tt and TT both look tall


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    Dominant/recessive

    Incomplete dominance

    Co-dominance

    What are the 3 different kinds of inheritance you learned about?

    Offspring of the P1 generation are called

    ______

    F1


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    What are the possible offspring of a cross between a blood type AB mom and a type O dad?

    A B

    O

    O

    Ao Bo

    Ao Bo

    What are the probable blood types of the offspring?

    50% Type A

    50% Type B


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    Which of the following crosses would you expect to see a 9:3:3:1 ratio in the offspring?

    SSYY X ssyy

    SsYy X SsYy

    ssYY X SSyy

    SsYy X SsYy

    9:3:3:1 ratio is seen in dihybrid crosses


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    Purple (P)is the dominant color for monsters. Yellow is recessive (p).

    Make a cross between a HOMOZYGOUS purple and a yellow monster.

    P P

    p

    p

    Pp Pp

    Pp Pp

    What will the offspring be like?

    (% and color)

    100% purple


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    What genotype would a PURPLE dad have to be to make a yellow monster baby with a Purple (Pp) mom monster?

    pp

    Pp

    Dad needs to have: a little p to give one to the baby

    a big P to be purple himself


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    Wilma and Fred are going to have a baby.

    Fred in AA and Wilma is oo.

    What are the possible blood types of their baby?

    A A

    o

    o

    Ao Ao

    Ao Ao

    100% will have A type blood


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    Wilma and Fred are going to have a baby.

    Fred in AA and Wilma is oo.

    What are the possible blood types of their baby?

    A A

    o

    o

    Ao Ao

    Ao Ao

    100% will have A type blood


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    What type of gametes can this organism produce?

    RrTt

    ______ ______ _______ _______

    RT rt rT Rt

    What type of gametes can this organism produce?

    WwGg

    ______ ______ _______ _______

    WG wg wG Wg


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    FILL IN THE BLANKS WITH THE WORDS

    Dominant OR Recessive

    In a DIHYBRID HETEROZYGOUS cross the offspring that are

    9/16 are _______________ for both traits.

    3/16 are _____________ for one trait and

    _____________ for the other.

    1/16 are _____________ for both traits.

    Dominant

    Dominant

    Recessive

    Recessive


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    T = TallR = red

    t = shortr = white

    In this cross: TtRr X TtRt

    What is the probability the offspring will be:

    Tall AND white? ____/16

    Short AND red? ____/16

    Tall AND red? ___/16

    Short AND white? ___/16

    3

    3

    9

    1


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    T = TallY = yellow peas

    t = shorty = green peas

    In this cross: TtYy X TtYy

    What is the probability the offspring will be:

    short AND green? ____/16

    Short AND yellow? ____/16

    Tall AND green? ___/16

    tall AND yellow? ___/16

    1

    3

    3

    9


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    Y = yellow peasR = red flowers

    y = green peasr = white flowers

    In this cross: YYRR X yyRR

    Be careful!

    What is the probability the offspring will be:

    Yellow peas AND white flowers? ____/16

    Green peas AND red flowers? ____/16

    Yellow peas AND red flowers? ___/16

    Green peas AND white flowers? ___/16

    0

    0

    16

    0


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