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Sex. Repro 2
I'm Lichen Bio Sexual Repro Stack 2
| Question | Answer |
|---|---|
| provides optimum temp for sperm production | scrotum |
| chromosomes that contain genes for the same traits | homologous |
| function of yolk | food for developing embryo |
| separation of homologous pairs of chromosomes during meiosis | disjunction |
| location of gas exchange btwn mother's blood and blood of her fetus | placenta |
| example of negative feedback in female reproductive system | pituitary hormones FSH and LH cause ovaries to secrete hormones, which in turn influence production of pituitary hormones |
| if a sperm cell has 9 chromosomes, how many in a body cell? | 18 |
| what regulates secondary sex char. in males | testosterone |
| organism with both male and female reproductive organs | hermaphrodite |
| what kind of cells are normal diploid cells | body cells that contain homologous pairs of chromosomes |
| joining of sperm and egg produces a ??? | diploid zygote |
| process of making gametes | gametogenesis |
| what process produces a zygote? | fertilization |
| another word for sex cells | gametes |
| put the following words in the correct order: cleavage, meiosis, fertilization, differentiation | meiosis, fertilization, cleavage, differentiation |
| result of crossing-over during meiosis | genes are rearranged, increasing variations of offspring |
| in the menstrual cycle, what happens immediately after the follicle stage? | release of an egg from an overy |
| what does 2N stand for? | diploid # of chromosomes in a body cell |
| periodic shedding of uterine lining takes place when | if fertilization does not occur |
| source of food for marsupial offspring | mammary glands in pouch produce milk |
| fertilization of 2 eggs at the same time produces...? | fraternal twins |
| in oogenesis in humans, a primary sex cell produces what? | 1 monoploid egg and 3 polar bodies |
| type of fertilization of animals that produce very large numbers of eggs in a cycle | external |
| internal fertilization is an adaptation for ? | sexual repro in terrestrial biomes |
| permanent cessation of menstrual cycle | menopause |
| a zygote develops into an embryo as a result of what | cleavage |
| what normally occurs at day 14 of the menstrual cycle | ovulation |
| what happens with hormones during the follicle stage of menstrual cycle | high level of estrogen may stimulate production of LH |
| what usually happens at day 28 of menstrual cycle | menstruation |
| in humans, where does fertilization normally occur | oviduct |
| what event occurs in meiosis but not mitosis | synapsis of homologous chromosomes and crossing over |
| site of exchange btwn mother and fetus | placenta |
| endocrine gland that helps regulate menstrual cycle | pituitary |
| where does meiosis occur | testes and ovaries |
| where does the corpus luteum develop | in ovaries, after egg is ovulated |
| implantation of embryo occurs here | uterine wall |
| structure in male that produces and secretes a liquid to transport sperm | glands |
| produces testosterone | testes |
| restoration of species number of homologous chromosomes occurs during... | fertilization of an egg by a sperm |
| result of meiosis | 4 monoploid gametes |
| an organism can pass a gene mutation to its offspring if the mutation occurs in... | a gamete |
| what is ovulation | when an ovary releases an egg from a follicle |
| hollow ball stage of cleavage | blastula |
| indented stage of cleavage | gastrula |
| what type of cell division occurs during cleavage | mitosis |
| where are female sex hormones estrogen and progesterone made | ovaries |
| sex chromosomes of X and X in a zygote would develop into a ? | female |
| sex chromosomes of X and Y in a zygote would result in ? | a male |
| a human zygote has 2 sex chromosomes and how many autosomes (regular chromosomes)? | 44 |
| what does meiosis do to the pairs of homologous chromosomes in a primary egg cell? | splits them apart, so the egg only receives half the number...one of each homologous pairs |
| name 1 action a pregnant Mom might take that would have a negative effect on her baby | alcohol, drugs, tobacco |
| why do some species have to lay 100's of eggs for the species to survive | because some are laid in water, which could wash them away, or they might be eaten |
| why must fertilization in birds and reptiles be internal? | in order to enclose the developing embryo in the shell to protect it from drying out once it is laid on land |
| why do human species survive, even though we only usually produce 1 offspring at a time | because we have internal fertilization and internal development, and we also give parental care for a long period of time |
| what type of twins are always of the same sex | identical |
| how do identical twins form | from one sperm fertilizing one egg, and then the zygote splits into 2 zygotes during cleavage |
| what is one benefit of artificial insemination to farmers | can pick the sperm from catalog of 100;s, thus selective breeding to improve traits of offspring |
| know all diagrams! | (blank) |
Created by:
thomase
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