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Effectus [21]
2 years ago
11

suppose a mother carries two recessive genes for freckles (rr) and a father carries one recessive gene for freckles and one domi

nant gene for clear facial skin (rr). what is the likelihood that their first child will have freckles?

Biology
2 answers:
Ronch [10]2 years ago
3 0
75% that its gonna have atleast a few
Nina [5.8K]2 years ago
3 0

Answer:

50%

Explanation:

In mendelian inheritance, we can solve this making a punnet square. Given the information, the mother is homocygote to the recessive genes for freckes (rr), and th father is heterocygote, having a dominant copy for clear facial skin, which we will denote Rr. In the punnet sqare attached, we can see that the probability of inheriting the phenotype for the freckles is 50%,. This is a recessive trait, so, for expression it need to be homocygote (rr).

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The nurse is assessing a primipara's fundal height at 36 weeks' gestation and notes the fundus is now located at the xiphoid pro
jekas [21]

<span>The nurse should assure the client that the condition of her baby is normal. The fundus should be at xiphoid process of the sternum by 36 weeks and measurement of fundal height is use as tool for gauging fetal growth. Moreover, the nurse should remind the mother to take care of herself and should consult a doctor if she may experience sudden sharp abdominal pain or vaginal bleeding.</span>

8 0
2 years ago
In mammoths, assume that spotted skin (S) is dominant over non-spotted skin (s) and that wooly hair (W) is dominant over non-woo
lisabon 2012 [21]

Answer:

Genotypic and Phenotypic ratios → 1:1:1:1

  • 25% of the progeny is expected to be SsWw, exhibiting spotted skin and wooly hair, SsWw
  • 25% of the progeny is expected to be Ssww, exhibiting spotted skin and non-wooly hair, Ssww
  • 25% of the progeny is expected to be ssWw, exhibiting non- spotted skin and wooly hair, ssWw
  • 25% of the progeny is expected to be ssww, exhibiting non-spotted skin and non-wooly hair, ssww

Explanation:

<u>Available data</u>:

  • spotted skin (S) is dominant over non-spotted skin (s)
  • wooly hair (W) is dominant over non-wooly hair (w)
  • Cross: heterozygous spotted, non-wooly mammoth with a heterozygous wooly-haired, non-spotted mammoth.

Parentals) Ssww   x   ssWw

Gametes) Sw, Sw, sw, sw

                 sW, sW, sw, sw

Punnett square)     Sw            Sw           sw           sw

                  sW      SsWw      SsWw      ssWw     ssWw

                  sW      SsWw      SsWw      ssWw     ssWw

                  sw      Ssww       Ssww       ssww      ssww

                  sw      Ssww       Ssww       ssww      ssww

F1) 4/16 = 1/4 = 25% of the progeny is expected to be SsWw, exhibiting spotted skin and wooly hair

    4/16 = 1/4 = 25% of the progeny is expected to be Ssww, exhibiting spotted skin and non-wooly hair

    4/16 = 1/4 = 25% of the progeny is expected to be ssWw, exhibiting non- spotted skin and wooly hair

    4/16 = 1/4 = 25% of the progeny is expected to be ssww, exhibiting non-spotted skin and non-wooly hair.

Genotypic and Phenotypic ratios → 1:1:1:1

7 0
2 years ago
In lizards, the gene for color and the gene for pattern are located on the same chromosome and exhibit recombination. The lined
Molodets [167]

Answer:

The all possible gametic haplotypes that can be made are described below.

Explanation:

According to the question, F1 progeny was produced by crossing a homozygous dominant parent with a homozygous recessive parent. As per the question, cross is to be made with a heterozygous parent, which will have solid unpatterned allele and blue colour with a homozygous recessive i.e lined, aqua lizard.

The possible haploid gametes for the heterozygous parent would be BL, bl, Bl, bL and for homozygous parent would be all bl.

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Law Incorporation [45]
The correct answer should be D. ecological footprint

Biodiversity means having various species living together while habitat is a place of residence of species. Sustainability refers to the question whether or not something is ecologically sustainable.
7 0
2 years ago
In the following image, what conclusion can you draw about the speed of the planet at location A compared to location B? (2 poin
aleksandr82 [10.1K]

The answer is; When the planet is at A it is moving faster than at B.

This is because when the planet is closer to the sun at point A, it is experiencing a stronger gravitation, by the sun, pull than at point B. Therefore, its acceleration due to gravity at point A is higher than at point B.

6 0
2 years ago
Read 2 more answers
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