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antiseptic1488 [7]
2 years ago
9

Assume that a cross is made between two organisms that are both heterozygous for a gene that shows incomplete dominance. What ge

notypic ratio is expected in the offspring?
Biology
2 answers:
Furkat [3]2 years ago
5 0

Answer:

Genotypic ratio: 1 homozygous for parental trait : 2 heterozygous : 1 homozygous for other parental trait

Explanation:

Incomplete dominance is a non-mendelian type of inheritance in which one allele of a gene portrays Incomplete dominance over the other allele, hence, they combine to form a third phenotype that is a blending of both parental phenotypes. A very good example of incomplete dominance gene is that of flower colour in snapdragon plants.

One allele of the flower colour gene codes for RED while the other codes for WHITE. However, an heterozygous intermediate phenotype (PINK) is formed as F1 offspring when both parents are crossed.

If the F1 heterozygous offsprings are self-crossed i.e. two heterozygous offsprings, four possible offsprings will be produced with the genotypic ratio 1:2:1, which means that 1/4 of the offsprings will be homozygous for one of the parental traits, 2/4 will be heterozygous for both alleles, 1/4 will be homozygous for the other parental trait.

EastWind [94]2 years ago
3 0

Answer:

1:2:1

Explanation:

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Match the genetic mutations with their names.
dusya [7]

Answer:

1. CGAGGTT → CGTT (Deletion)

2. ATTCGG → ATTCGGATTCGG (Duplication)

3. CTTAAT → TAATTC (Inversion)

4. CTTAAT → CTTAACGCT (Insertion)

5. CGAT → CTAT (Substitution)

6. CCGGTT + TTAGGC = CCGTTA + GTTGGC (Translocation)

Explanation:

1. CGAGGTT → CGTT (Deletion) ---- This is called deletion because it involves the removal of 3 base pairs (AGG) from the DNA sequence.

2. ATTCGG → ATTCGGATTCGG (Duplication) ---- In this case, the particular sequence (ATTCGG) is copied again or duplicated.

3. CTTAAT → TAATTC (Inversion)----- This is called inversion mutation because the DNA sequence breaks off and is reattached but this time in a reverse order i.e. CTT becomes TTC, placing the last base first and the first base last.

4. CTTAAT → CTTAACGCT (Insertion) ------ This is called insertion mutation because it involves the addition of extra base pairs (CGC) into the sequence. The Insertion occurs between the last A and T nucleotide.

5. CGAT → CTAT (Substitution) ----- This is called substitution because Guanine base is replaced by Thymine in the DNA sequence. It is specifically called a transversion substitution because a purine (Guanine) is replaced by a pyrimidine (Thymine). It is called a point mutation because it involves a single base.

6. CCGGTT + TTAGGC = CCGTTA + GTTGGC (Translocation) ----- in this case, CCGGTT and TTAGGC are sequences on different chromosomes. Portions of sequence on the first chromosome (GTT) and second chromosome (TTA) breaks off and gets reattached/exchanged in each other i.e. the first chromosome gets TTA while the second gets GTT. This kind of mutation is called translocation.

4 0
3 years ago
Hormones are chemical molecules produced by indoor green glands one such endocrine gland is the thyroid gland which synthesizes
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Answer:

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Explanation:

7 0
2 years ago
Help please, this is for a test and I would like to double check my answer with someone
ehidna [41]

Answer:

It would be B

Explanation:

By doing the punnet square, you get BB, BB ,Bb, Bb, of which 50% are heterozygous.

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2 years ago
How is stomach acid neutralized in the small intestine
Bingel [31]
"It converts the inactive enzyme pepsinogen into the active enzyme pepsin, which is responsible for digesting proteins in your stomach. HCL also helps digest other foods in your stomach. Ultimately, HCL is neutralized by chemicals secreted in your small intestine." But, use your own words, though. Because I just hit copy & paste. Hope this helps!
4 0
3 years ago
A plant growing in an area where it is not required is called?
lora16 [44]

Answer:

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Explanation:

it’s a plant that is out of place, undesirable, or an annoyance because it interferes with agricultural or animal production.

hope this helped!

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2 years ago
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