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3 years ago

What is menopause, and why does it occur?

Biology

2 answers:

katovenus [111]3 years ago

5 0

Answer:

A woman is born with all of her eggs, which are stored in her ovaries. The ovaries also make the hormones estrogen and progesterone, which control her period (menstruation) and the release of eggs (ovulation). Menopause happens when the ovaries no longer release an egg every month and menstruation stops.

Yuri [45]3 years ago

4 0

Menopause is the phase in a woman’s life when they stop releasing eggs every month

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If free earlobes are dominant to attached earlobes, write out the possible genotype(s) a person could have if they have free ear

Katyanochek1 [597]

Answer:

Say the dominant gene is G, for free earlobes. Say the recessive gene is g.

We only need one G for free earloves to show. The possible genotypes are,

Gg and GG.

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3 years ago

Los temas.<br> 1. ¿La Meiosis es la división propia de células?

Setler [38]

Answer:

Explanation:

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3 years ago

The ABO blood group assorts independently of the Rhesus (Rh) blood group and the MN blood group. Three alleles, IA , IB , and i,

Eva8 [605]

Answer:

Part 1:

The mother’s genotype is ii, rr, MN

The father’s genotype is IAIA/IAi, Rr, MM

Part 2:

Approximately 1/32 (3.125%) of children can be expected to have the stated blood types.

Explanation:

Part 1:

The mother has blood types 0, Rh- and MN. Therefore, her genotype has to be ii, rr, MN.

The father has ABO type A. His ABO genotype may therefore be either IAIA or IAi, as both are compatible with type A offspring with a type 0 mother. His Rh genotype must be rr, since his Rh- child necessarily has to have inherited one r allele from each parent. Finally, his MN genotype has to be MM since both alleles are codominant.

Part 2:

Using the given data, we build the following Punnett chart:

IA R N IA r N i R N i r N

IA R M

IA R N

IA r M

IA r N

IB R M

IB R N

IB r M X

IB r N

Note that, of all 32 possible combinations, only a single one of them (marked with “X” produces a genotype which matches the desired blood type, as follows:

genotype: IBi, rr, MN

blood type: B, Rh-, MN

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3 years ago