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Sergeu [11.5K]
3 years ago
9

The expected phenotypic ratio of a dihybrid cross is

Biology
2 answers:
il63 [147K]3 years ago
7 0

Answer:

9:3:3:1

Explanation:

Arlecino [84]3 years ago
3 0

Answer:9:3:3:1

Explanation: Just took the test!

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A woman with type A blood (whose father was type O) has children with a man that has type O blood. Both individuals are heterozy
Fantom [35]

Answer:

Explanation:

A woman with type A blood (whose father was type O) meaning her genotype is AO mates with

Man that has type O blood (OO genotype)

Both are heterozygous for MN blood group and both also heterozygous for the FUT1 gene controlling the synthesis of the H substance (Hh)- which determines the expression of the A and B antigen.

Cross

A O M N H h

O AO OO M MM MN H HH Hh

O AO OO N MN NN h Hh hh

Type A- 1/2 O-1/2 type M- 1/4 MN-1/2 N- 1/4, type H- 3/4 h-1/4

Type A with M antigen:

1/2*1/4*3/4 = 3/32

Type A with M and N antigens:

1/2*1/2*3/4 = 3/16

Type A with N antigen:

1/2*1/4*3/4 = 3/32

Type O with M antigen:

1/2*1/4*3/4= 3/32

Type O with M and N antigens:

1/2*1/2*3/4 = 3/16

Type O with N antigen:

1/2*1/4*3/4 = 3/32.

The 3/4 value comes from the expression of Hh-3/4 (this determines if the A and B Angie will be expressed).

8 0
3 years ago
What is one disadvantage to using molecular evidence to compare species?
Mkey [24]

A major disadvantage with molecular phylogeny is the difficulty in making assumptions in a species with variations in their phylogenies yet they have the same genotype. The emergence of horizontal gene transfer has also complicated molecular phylogenetics. Making inferences on positional homology in different organisms is also difficult and complicated.






6 0
3 years ago
Two nucleotides on the same strand form a __________ bond while two complimentary bases on opposite strands form ____________ bo
Anna [14]

Two nucleotides on the same strand form a <u>Phosphodiester bond </u>while two complimentary bases on opposite strands form <u>Hydrogen bonds</u>. An a-t base pairing forms <u>2</u> such bonds.

The constituent components that make up DNA's double-helix structure are known as nucleotides. Each nucleotide has a base in it. The four various colors you see here stand for the four different bases that might be used. Between nucleotides, a unique kind of covalent link known as a phosphodiester bond occurs. The two strands of DNA are formed by these phosphodiester linkages.

Hydrogen bonds are the bonds that develop between base pairs. Thymine and adenine make two hydrogen bonds, and guanine and cytosine form three hydrogen bonds. Therefore, we have concluded that hydrogen bonds are the type of binding that develops between base pairs in DNA to hold the two strands of a double helix together.

To know more about Phosphodiester bond visit the link:

brainly.com/question/23660733?referrer=searchResults

#SPJ4

8 0
1 year ago
Which pair of molecules both contain carbon atoms?
Nina [5.8K]
Fats and proteins are the answer

7 0
3 years ago
Explain why red blood cells are normally absent from glomerular filtrate ?
matrenka [14]

Answer:

They are too big to pass through Bowman's capsule

Explanation:

5 0
3 years ago
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