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3 years ago

Explain spermatogenesis and oogenesis.

Biology

1 answer:

Jet001 [13]3 years ago

8 0

Answer:

yep, my explanation

Explanation:

you see, it is a very dirty cycle, when you have a dioploid cell, you have your typical duplication of sister chromotids, but producing sex cells or gametes which would become a zygote through dirty interactions come to form one dioploid cell and it will start doubling like the rest of the human body, until it comes out of the other human's body. meiosis, or the formation of gamates are created with a crossover where one diolpoid cell takes one half of the chromosome and the other half and exchange a tiny bit of it before splitting into 2 DIFFERENT gametes cells because of the cross-over and hence ther term natural selection

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The mating of an Aa male and an aa female produced an offspring with the genotype AAa. Therefore, the offspring has 3 copies of

blondinia [14]

Answer:

Ana-phase 1 of Meiosis 1 in Male Parent...

Explanation:

It is clear that meiosis is only happening in male due to AAa nondisjuction of dominant AA from male parent. The disjunction is occuring during spermato-genesis during Ana-phase 1 of Meiosis 1 cause it is only possible explanation of tri-somy at Chromosome 1...

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3 years ago

An object has a mass of 8.00 kg. what is the force due to gravity in the object

givi [52]

Answer:

Explanation:

When a mass of 8 kg is located on the Earth's surface, the magnitude of each of

the gravitational forces attracting the mass and the Earth toward each other is

(mass) x (acceleration of gravity on Earth) =

(8.0 kg) x (9.81 m/s²) =

78.48 kg-m/s² = 78.48 newtons (about 17 pounds 10.2 ounces)

4 0

3 years ago

Residents of three villages with three different sources of water supply were asked to participate in a survey to identify chole

lubasha [3.4K]

Answer:

a. Cross-sectional study

Explanation:

A cross-sectional analysis includes at one particular point in time looking at data from a population. Participants are chosen based on specific variables of interest in this type of study.

For developmental psychology, cross-sectional experiments are often used, but this approach is also used in many other fields, including social science and education.

3 0

3 years ago

The genetic material that is loosely dispersed throughout the nucleus in a threadlike form is called the

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The genetoc material is chromosomes

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3 years ago

Two genes determining a trait In primroses, the dominant allele of gene K is necessary to synthesize blue flower pigment. Blue p

viktelen [127]

Answer:

The ratio of blue to white offspring in the progeny is 4 blue : 12 white.

Explanation:

Available data:

The dominant allele K is necessary to synthesize blue flower pigment
K is inhibited by the dominant allele D

Plants with the genotype K- D- will not produce pigment (and their flowers will be white)

Cross: testcross for (Kk Dd) plants

Parental) KkDd x kkdd

Gametes) KD kD Kd kd

kd kd kd kd

Punnet square) KD Kd kD kd

kd KkDd Kkdd kkDd kkdd

Whenever D is present, it inhibits the expression of the K gene, so every plant with the dominant D allele will be white. This plants´ genotype is kkD- or K-D-.

Whenever D is absent and K is present, every plant with genotype K-dd will be blue.

The recessive form for K and D genes will express white-flowered plants, with genotype ddkk

F1) Progeny genotype: 4/16 KkDd, white-flowered plants

4/16 Kkdd, blue-flowered plants

4/16 kkDd, white-flowered plants

4/16 kkdd, white-flowered plants

The ratio of blue to white offspring in the progeny is 4 blue : 12 white.

Blue-flowered plants: 4 Kkdd

White-flowered plants: 4 KkDd + 4 kkDd + 4 kkdd

8 0

4 years ago