unite 3 hw and quizzes

Each that represent a gamete

BcD,fgH,K,aSD,PqsT

Green

Tobacco seedlings with a genotype CC or Cc are_in color

1:1:2:0

In an x-linked fruit fly cross, the cross X^R X^r x X^R Y would yieled a count of __for the phenotypic ratio of red-eyed males: white eyed maled:red eyed females: ehite eyed females.

nn

The genotype of a person who has an autosomal recessive disease

short stemmed

the genotype of a pea plant this is a tt genotype

half of the females are not carriers of color blindness, half of the females are carriers, half of the males are colorblind

X^B X^b x X^B Y you could predict the follow about their children

do not need to eat

Drosophila (fruit flies) are used in genetics experiments for all of the following reasons EXCEPT

1:1

The expected phenotypic ratio of the following cross Cc x cc would be

one cell with extra homologous chromosomes and one cell missing a homologous chromosome

if nondisjunction during anaphase I, then meiosis produces

XRXR

red eyed female

XRXr

red eyed female

XRY

red eyed male

XrY

white eyed male

XrXr

white eyed female

color blindness

Xb is the gene for

4 long wings: 0 short wings

In fruit flies if L is long wings and l is short wings, the cross Ll x LL would yield

RG, Rg

possible gametes from RRGg

3:1

In a monohybrid plant cross a 18:6 or 30:9 ratio would be

9:3:3:1

In a dihybrid fruit fly cross of LlBb x LlBb, (L = long wings, l=short wings, B=light brown body, b=ebony body) the phenotypic ratio was 17:5:6:2.  This is closest to

Ll x Ll

if the ratio of offspring phenotypes is 3:1 then the likely parental genotypes are

1 tall: 1 short

In pea plants, tall (T) is dominant and short (t) is recessive.  A heterozygous plant is crossed with a short plant.  What is the expected phenotypic ratio in the offspring?

pp

In pea plants, purple flowers are dominant to white flowers.  Which genotype would result in a plant with white flowers?

AaBb

Cross AAbb x aaBB

match the letters to their labels

M : DNA N: mRNA O:template strand P: amino acid Q: tRNA R: ribosome X: codon

ribose, uracil, phosphate

Found in RNA

UAACGC

ATTGCG m RNA transcript

Contains A,C,G and U

All of the following are true about DNA EXCEPT

mutate

The characteristic of the genetic material that provides the variabilty needed for evolution to occur is its ability to

DNA was a genetic material

In there experiment Hershey and chase were trying to prove that

A nucleotide

is a building block of nucleic acids

GCA TCA TCA T

if the DNA codons are CAT CAT CAT, a guanine base added to the beginning, what would result?

ribosomes

At what site is mRNA translated to make proteins?

uracil; mRNA

During transcription at the point at which the DNA strand being copied has an adenine, a/n__is added to the___

95

If a segment of DNA contains 430 nucleotides has 120 adenine molecules. then there will be _____ cytosine molecules.

Since all cells in your body have the same DNA, each cell actively expresses the same genes.

FALSE

structural gene

which operon structure codes for the enzymes involved in metabolic pathways of the operon?

break down lactose

lac operon function to

The regulator gene codes for the DNA-binding proteins that act as repressors

TRUE

bind with RNA polymerase

In operon models, the function of the promoter is to

They cause the promoter to move to a different place in the DNA

Which of the below is NOT true of point mutations?

Thymine dimers

form when DnA is exposed to UV radiation

result from a base substitution

Which of the below statements is NOT true of frameshift mutations?

induced mutations

Mutagens and carcinogens are associated with

frameshift mutation

a deletion of one base pair that alters the sequence of codons is called a

fertilization

results in the production of a diploid (2N or 2n)

ectoderm- nervous system

matched with adult vertebrate structure

acrosomal cap

the part of the sperm that releases enzymes allowing the sperm nucleus to enter the egg is made by the

chorion

the extraembryonic membrane contributing to the formation of the placenta

2 zygote, 3 morula, 1 blastula, 4 gastrula

1 blastula, 2 zygote, 3 morula, 4 gastrula put them in order of embryonic stage

gastrulation is complete when

three embryonic germ layers of cells are present

amnion

which embryonic membrane is fluid filled and surrounds the developing embryo/ fetus

2

the baby is delivered during stage—— of partuition

morula

during early stages of animal development, cleavage produces a solid ball of cells called a

gastrulation

the tree germ layers form during which developmental stage?

development

all the changes that occur during the life cycle of an organism are collectively called

miotic cell division

what occurs during cleavage?

blastula-gut formation

which if these is mismatched?

cleavage

cellular division without growth is called

A genotype of the parent that shows the dominant trait

A test cross is done to determine

pink flowers

in an incomplete dominance pattern, if a white four o’ clock flower is crossed with a red flour o’clock flower the offspring will have

LG, Lg, lG, lg

the possible gametes produced from LlGg would be

lower case

Recessive genes are represented by ___letters

stages of human development

1 ovulation, 2 fertilization. 3 cleavage, 4 implantation

removes fetal waste; provides the fetus with nutrients

functions of the placenta