Question

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1- When crossing two organisms for a single trait - one that is homozygous recessive with...

1- When crossing two organisms for a single trait - one that is homozygous recessive with one that is homozygous dominant - what is the chance of producing an offspring with the homozygous recessive phenotype?

Group of answer choices

75%

25%

100%

2- Incomplete dominance is when?

Group of answer choices

Homozygotes show an intermediate phenotype

There is no homozygous genotype

Heterozygotes show an intermediate phenotype

Heterozygotes share dominance

3- When antibodies in the plasma attach to antigens on the surface of the RBC this occurs.

Group of answer choices

nothing occurs

agglutination

coaggulation
4- Mendel's law of independent assortment states that

Group of answer choices

during meiosis, each pair of alleles segregates independently of the other pairs of alleles during gamete formation.

chromosomes sort independently of each other during mitosis and meiosis.

genes are sorted concurrently during gamete formation.

independent sorting of genes produces polyploid plants under some circumstances.

5- New alleles in a population come about via what process?

Group of answer choices

mitosis

Mutation

fertilization

6- Genes found only on the X or Y chromosomes are said to be

Group of answer choices

dominant

sex linked

recessive only

autosomes

7- A mother and newborn baby both need blood transfusions. The father is not currently available for typing and donation. Mother is type O negative and baby is type O positive.

The father of the baby must be Rh . The mother , safely donate blood to the baby. The father arrives later and after typing his blood its concluded that he can safely donate to his baby - which means that his blood type is .

Solutions

Expert Solution

Question 1) option 25% chances

Let's say take height TT tall

tt dwarf

TT X tt

TT : Tt: tt

1 2 1 no of progeny

So homozygous recessive tt (1/4) or 25%

Question 2) option c, heterozygous show intermediate phenotypes.

Here dominant dies not show complete dominance over recessive, so intermediate phenotype is produced.

Example , four O clock plant flower colour

R-- Red , r white

RR X rr

RR : Rr : rr

1: 2 : 1

Red : pink : white

Rr pink , intermediate colour showing incomplete dominance

Question 3) agglutination

When antibody bind at antigen present of RBC surface. It will lead to formation of net like structure known as agglutination.

Question 4)

during meiosis, each pair of alleles segregates independently of the other pairs of alleles during gamete formation.

Question 5) option C, mutation

Mutaion is the process which is continuous source of generating new allele in the population.

Question 6) option B , sex linked

Question 7) if mother is Rh- ve

Baby is Rh+

That means father must be Rh+ ve

gladiator answered 1 year ago

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